Answered You can buy a ready-made answer or pick a professional tutor to order an original one.

QUESTION

# Rasmussen STA3140 final exam 2016

Question

Mark 1.00 out of 1.00

Flag question

Question text

Find the critical value zα/2 that corresponds to a degree of confidence of 98%.

Select one:

a. 1.75

b. 2.33

c. 2.05

d. 2.575

Question 2

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Find the margin of error for the 95% confidence interval used to estimate the population proportion.

n = 163, x = 96

Select one:

a. 0.0755

b. 0.00291

c. 0.132

d. 0.0680

Question 3

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.

n = 165, x = 138; 95 percent

Select one:

a. 0.779 < p < 0.892

b. 0.791 < p < 0.881

c. 0.780 < p < 0.893

d. 0.790 < p < 0.882

Question 4

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Find the minimum sample size you should use to assure that your estimate of will be within the required margin of error around the population p.

Margin of error: 0.04; confidence level: 99%; from a prior study, estimated by 0.13

Select one:

a. 272

b. 19

c. 469

d. 563

Question 5

Incorrect

Mark 0.00 out of 1.00

Flag question

Question text

459 randomly selected light bulbs were tested in a laboratory, 291 lasted more than 500 hours.

Find a point estimate of the true proportion of all light bulbs that last more than 500 hours.

Select one:

a. 0.388

b. 0.366

c. 0.634

d. 0.632

Question 6

Correct

Mark 1.00 out of 1.00

Flag question

Question text

A researcher is interested in estimating the proportion of voters who favor a tax on e-commerce.

Based on a sample of 250 people, she obtains the following 99% confidence interval for the population proportion p:

0.113 < p < 0.171

Which of the statements below is a valid interpretation of this confidence interval?

Select one:

a. There is a 99% chance that the true value of p

lies between 0.113 and 0.171.

b. If many different samples of size 250 were selected and, based on each sample, a confidence interval was constructed, in the long run 99% of the confidence intervals would contain the true value of p.

c. If 100 different samples of size 250 were selected and, based on each sample, a confidence interval was constructed, exactly 99 of these confidence intervals would contain the true value ofp.

d. If many different samples of size 250 were selected and, based on each sample, a confidence interval was constructed, 99% of the time the true value of p would lie between 0.113 and 0.171.

Question 7

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the confidence level and sample data to find the margin of error E. College students' annual earnings: 99% confidence; n = 74, = $3967, s =$874

Select one:

a. $1187 b.$237

c. $9 d.$262

Question 8

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the confidence level and sample data to find a confidence interval for estimating the population m. A group of 56 randomly selected students have a mean score of 30.8 with a standard deviation of 4.5 on a placement test. What is the 90 percent confidence interval for the mean score, m, of all students taking the test?

Select one:

a. 29.6 < m < 32.0

b. 29.8 < m < 31.8

c. 29.2 < m < 32.4

d. 29.4 < m < 32.2

Question 9

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the margin of error, confidence level, and standard deviation s to find the minimum sample size required to estimate an unknown population mean .

Margin of error: $139, confidence level: 95%, s =$513

Select one:

a. 3

b. 5

c. 46

d. 53

Question 10

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Do one of the following, as appropriate: (a) Find the critical value zα/2, (b) find the critical value tα/2, (c) state that neither the normal nor the t distribution applies.

99%; n = 17; s is unknown; population appears to be normally distributed.

Select one:

a. zα/2= 2.575

b. tα/2= 2.921

c. tα/2 = 2.898

d. neither

Question 11

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Identify the null hypothesis H0 and the alternative hypothesis H1. A researcher claims that 62% of voters favor gun control.

Select one:

a. H0: p ≥ 0.62

H1: p < 0.62

b. H0: p = 0.62

H1: p ≠ 0.62

c. H0: p ≠ 0.62

H1: p = 0.62

d. H0: p < 0.62

H1: p ≥ 0.62

Question 12

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Assume that the data has a normal distribution and the number of observations is greater than 50. Find the critical z value used to test a null hypothesis.

α = 0.05 for a left-tailed test.

Select one:

a. ±1.645

b. -1.645

c. -1.96

d. ±1.96

Question 13

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the given information to find the P-value. The test statistic in a right-tailed test is z = 1.43.

Select one:

a. 0.4236

b. 0.0434

c. 0.0764

d. 0.5000

Question 14

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution, Student t distribution or neither.

Claim: µ = 977. Sample data: n = 25, x-bar = 984, s = 25. The sample data appear to come from a normally distributed population with  s = 28.

Select one:

a. Student t

b. Neither

c. Normal

Question 15

Incorrect

Mark 0.00 out of 1.00

Flag question

Question text

Identify the null hypothesis and the alternative hypothesis .

A cereal company claims that the means weight of the cereal in its packets is at least 14 oz.

Select one:

a. H0: µ > 14

H1: µ K 14

b. H0: µ < 14

H1: µ L 14

c. H0: µ = 14

H1: µ < 14

d. H0: µ = 14

H1: µ > 14

Question 16

Correct

Mark 1.00 out of 1.00

Flag question

Question text

A medical school claims that more than 28% of its students plan to go onto general practice. It is found that among a random sample of 130 of the school’s students, 32% of them plan to go into general practice. Find the P-value for a test of the school’s claim.

Select one:

a. 0.1539

b. 0.3078

c. 0.1635

d. 0.3461

Question 17

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Find the critical value or values of based on the given information.

H1: s > 26.1, n = 9, α = 0.01

Select one:

a. 20.090

b. 2.088

c. 1.646

d. 21.666

Question 18

Incorrect

Mark 0.00 out of 1.00

Flag question

Question text

Assume that a hypothesis is test of a given claim will be conducted. Identify the type I error for the test.

Select one:

a. The error of rejecting the hypothesis that the mean is more than 30 miles per gallon when it is really more than 30 miles per gallon.

b. The error of rejecting the hypothesis that the mean is 30 miles per gallon when it really is greater than 30 miles per gallon.

c. The error of failing to reject the hypothesis that the mean is 30 miles per gallon when it is actually greater than 30 miles per gallon.

d. The error of failing to reject the hypothesis that the mean is equal to 30 miles per gallon when it is actually 30 miles per gallon.

Question 19

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Find the number of successes x suggested by the given statement. A computer manufacturer randomly selects 2360 of its computers for quality assurance and finds that 2.54% of these computers are found to be defective.

Select one:

a. 63

b. 60

c. 65

d. 58

Question 20

Correct

Mark 1.00 out of 1.00

Flag question

Question text

From the sample statistics, find the value of used to test the hypothesis that the population proportions are equal.

n1 = 507

n2 = 140

x1 = 194

x2 = 35

Select one:

a. 0.566

b. 0.257

c. 0.353

d. 0.642

Question 21

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Compute the test statistic used to test the null hypothesis that . In a vote on the Clean Water bill, 41% of the 2005 Democrats voted for the bill while 40% of the 230 republicans voted on the bill.

Select one:

a. 0.233

b. 0.180

c. 0.127

d. 0.211

Question 22

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Determine whether the samples are independent or consist of matched pairs (dependent samples). The effectiveness of a new headache medicine is tested by measuring the amount of time before the headache is cured for patients who use the medicine and another group of patients who use a placebo drug.

Select one:

a. Independent Samples

b. Matched pairs

Question 23

Correct

Mark 1.00 out of 1.00

Flag question

Question text

The two data sets are dependent. Find to the nearest tenth.

x 12.9 11.3 10.7 12.9 12.9

y 12.6 12.6 10.0 10.7 12.3

Select one:

a. 0.3

b. 0.7

c. 0.5

d. 0.6

Question 24

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Assume that you want to test the claim that the paired data come from a population for which the mean difference is . Compute the value of the test statistic.

x 11 5 13 5 9

y 8 7 9 6 4

Select one:

a. t = 2.890

b. t = 0.578

c. t = 1.292

d. t = 0.415

Question 25

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Given the linear correlation coefficient r and the sample size n, determine the critical value of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.

r = -0.568, n = 25

Select one:

a. Critical values: r = ±0.396, significant linear correlation

b. Critical values: r = ±0.487, significant linear correlation

c. Critical values: r = ±0.487, no significant linear correlation

d. Critical values: r = ±0.396, no significant linear correlation

Question 26

Correct

Mark 1.00 out of 1.00

Flag question

Question text

The regression equation relating to attitude rating(x) and job performance rating (y) for the employees of a company is y^ = 11.7 + 1.02x. Ten pairs of data were used to obtain the equation. The same data yield r = 0.863 and y = 80.1 . What is the best predicted job performance rating for a person whose attitude rating is 70?

Select one:

a. 80.1

b. 81.9

c. 83.1

d. 12.6

Question 27

Correct

Mark 1.00 out of 1.00

Flag question

Question text

The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean temperature, µ, of 48°F, ideal for a certain type of German pilsner. The owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperature is incorrect.

Select one:

a. H0: µ = 48°

H1: µ = 48°

b. H0: µ≤ 48°

H1: µ > 48°

c. H0: µ = 48°

H1: µ ≠ 48°

d. H0: µ ≥ 48°

H1: µ< 48°

Question 28

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the given information to find the coefficient of determination. Find the coefficient of determination, given that the value of the linear correlation coefficient, r is -0.721.

Select one:

a. 0.520

b. 0.480

c. 0.279

d. 0.721

Question 29

Correct

Mark 1.00 out of 1.00

Flag question

Question text

Use the given data to find the equation of the regression line. Round the final values to three significant digits, if necessary.

x 1 3 13 7 9

y 143 116 100 98 90

Select one:

a. y^ = 150.7 – 6.8x

b. y^ = -150.7 + 6.8x

c. y^ = 132.79 - 3.54 x

d. y^ = 140.4 – 6.2x

Question 30

Correct

Mark 1.00 out of 1.00

Flag question

Question text

A researcher wishes to test whether the proportion of college students who smoke is the same in four different colleges. She randomly selects 100 students from each college and records the number that smoke. The results are shown below.

College A                    College B                    College C                    College D

Smoke             17                               26                                11                                34

Don't smoke    83                                74                                89                                66

Use a 0.01 significance level to test the claim that the proportion of students smoking is the same at all four colleges if the test statistic: x2 = 17.832.

Select one:

a. Reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the proportion of students smoking is the same at all four colleges.

b. Do not reject the null hypothesis. There is insufficient evidence to warrant rejection of the claim that the proportion of students smoking is the same at all four colleges.

c. Do not reject the null hypothesis. There is in sufficient evidence to warrant rejection of the claim that the proportion of students smoking is the same at all four colleges.

d. Reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the proportion of students smoking is the same at all four colleges.

• @
• 165 orders completed
ANSWER

Tutor has posted answer for $28.00. See answer's preview$28.00

*********

****

*** *** ** **** Flag

*********

******** text

****

*** ********

*****

********** **** corresponds ** * degree ** ********** ** 98% ****** ***** a ****

b

**** *

****

* *****

********

2 ********

****

*** ***

**

**** ****

question

******** *****

****

***

******

** error *** *** ***

**********

interval used

to

******** the

population

*********** * * *** * * *** ****** one: * ****** * 000291 c ***** d

******

******** ** ******** Mark *** out

**

100 ****

question

Question text

***

the given

******

** **********

***

****** data

to

********* *

**********

********

***

*** population proportion ** n

*

165 x

*

**** **

percent

****** ***** a **** **** p **** ***** * **** < * **** ***** * 0780 < p ****

*****

* **** **** * **** ***** Question **

********

**** ***

***

** **** **** question ******** *****

****

the ******* sample size *** ******

***

to ****** **** your estimate **

****

be ****** *** required margin **

error

****** ***

**********

p

******

of error: **** ********** ******

99%;

**** *

prior

study *********

**

013 Select ***** a **** * 19 * **** * 563 ******** ** Incorrect **** *** *** ** 100 **** question ******** text *** randomly ********

*****

bulbs **** ****** ** a laboratory 291 lasted **** **** *** hours Find *

*****

******** of

***

true **********

**

*** *****

*****

**** ****

****

**** ***

hours

****** *****

*

*****

*

***** c ***** * 0632

********

6 ********

****

*** out

**

100 **** ********* ******** text A ********** ** interested ** ********** the ********** ** ****** ***

*****

* tax on *********** ***** ** a sample ** *** ****** *** ******* *** ********* *** ********** interval

***

the **********

**********

*** ****

****

p <

*****

Which of

***

********** *****

**

* *****

**************

**

this

confidence interval? ****** ***** *

*****

is *

***

****** ****

***

true ***** of ** **** ******* **** *** ***** * If **** ********* ******* ** ****

***

**** selected and ***** ** **** ****** a confidence interval *** constructed ** *** **** run *** of ***

confidence

intervals ***** ******* the ****

*****

** ** * ** *** different samples of **** 250 **** ******** ***

based

** each

******

* ********** ******** *** *********** ******* ** ** ***** confidence intervals *****

contain

*** **** ***** **** *

**

**** different ******* ** size *** were ******** *** based ** each sample * ********** ******** *** constructed *** ** *** **** *** **** ***** ** p ***** *** ******* **** and ***** ******** 7 ********

****

100 *** of **** **** question Question ***** Use the ********** ***** *** sample **** ** **** *** ****** ** error * College ************* ****** ********* *** confidence; * * 74 =

*****

* * ***** ****** ***** * ****** b ***** * *** * ***** Question 8 Correct **** *** *** ** **** **** question Question ***** *** the ********** ***** *** sample data ** **** *

**********

******** ***

estimating

***

**********

* * ***** ** 56

********

******** ********

****

* ****

*****

of *** with * standard deviation of ** on a placement **** What is *** ** ******* confidence interval for *** **** ***** * ** *** ******** taking

***

test? ******

*****

* 296

****

* ****

****

b ***

<

* ****

****

c ***

****

*

****

**** d *** < *

****

322 ********

**

Correct ****

***

out of **** **** ********* ******** ***** *** *** margin ** error ********** ***** *** ******** ********* * to find *** ******* ****** **** ******** ** ******** ** ******* ********** **** ****** ** error: $139 ********** ****** 95% s *$513 ****** one: * ** * ** * *** * *** ******** 10 ******** **** *** *** of

****

**** *********

********

text ** one ** *** *********

**

************ *** Find *** critical *****

**********

(b) find *** critical ***** **********

(c)

state **** neither *** normal ***

***

t distribution

********

****

*

* 17; s ** ********

**********

appears to

**

******** ************

******

***** a *********** ***** * *********** 2921 c tα/2 * ***** * neither ******** *** Correct **** *** out of **** Flag ********* ******** *****

********

*** **** hypothesis ** and the *********** ********** H1 *

researcher

****** that

***

of ******

*****

*** ********

******

one: *

H0:

* ****

****

H1: p

****

062

*

H0: p * **** H1:

p

**** ****

*

H0: *

****

**** *** p * **** * H0: * < 062 *** p ≥ 062 ******** *** ******** Mark *** out ** 100 **** question ******** ***** Assume **** the data

***

* normal ************ and *** ****** ** observations ** ******* **** ** ****

the

******** z

*****

used to ****

a

null hypothesis *******

*

*** *** * ***********

test

Select *****

*

************* *

******

*

*****

* ±196 ******** *** Correct

****

100 out

**

**** Flag

*********

Question ***** *** the ***** *********** ** **** the P-value *** **** ********* in * ************ **** ** * =

****

Select *****

*

04236 * ****** c ******

* 05000 Question ***

******** **** 100 *** **

100 Flag ********* Question

***** ********* ******* the hypothesis

**** involves * ********

************ ** means **** **

a ****** distribution Student

*

************ or

********

Claim:

*******

* *** ****** data: n

*

** *****

=

984 *

*

** *** ****** **** ****** ** **** from * ******** *********** ********** with * * *** ****** ***** * ******* ** b ******** * Normal Question *** **********

Mark

*** *** of **** **** ********* ********

*****

******** ***

****

********** ***

the

*********** hypothesis

*

****** *******

claims

**** the

*****

weight **

***

******

in

*** ******* ** ** *****

14

oz ******

*****

a H0:

*******

**** 14 *** µ * 14 * *** ******* **** *** *** ******* L 14 * *** µ =

***

*** *******

****

*** *

***

******* *

***

*** *******

>

*** ********

16

******** ****

***

out

of

**** **** ********* ******** *****

*

******* ******

******

**** ****

****

*** ** its ******** plan ** go **** general ******** ** ** found **** ***** * ****** ****** ** *** **

the

************** students *** ** them **** ** go into general ******** Find *** ******* *** * **** ** *** school’s ****** ****** one: * 01539 * 03078 * ****** *

03461

******** ***

********

**** *** out

**

100 Flag

*********

******** *****

****

*** ********

*****

or

******

** ***** on *** *****

information

*** *

****

261 n

*

* ******* * **** Select ***** a 20090 *

*****

* ***** * ****** ******** 18 ********** Mark *** *** ** **** Flag ********* Question text ****** **** a

**********

is test

of

a ***** ***** **** **

conducted

******** *** **** *

error

*** the ***** ****** *****

*

The ***** ** rejecting

***

********** **** *** **** is

****

**** ** miles ***

******

**** ** is ****** ****

than

30 ***** per *******

*

*** *****

**

*********

***

********** **** the **** **

**

***** ***

gallon

**** it

really

** ******* **** ** miles per ******* * The ***** ** ******* ** ****** the hypothesis **** *** mean ** ** ***** per gallon **** it ** actually ******* **** ** miles per ******* * *** ***** ** failing ** ****** *** ********** **** *** mean is ***** ** 30

miles

*** ******

****

it **

actually

30 *****

***

gallon ********

19

******** ****

***

out of

****

****

question

******** ***** **** *** ******

**

********* *

*********

by ***

given

statement A computer ************ ******** selects 2360 ** its ********* *** quality

*********

*** ***** **** **** of ***** ********* *** ***** to

**

********** ******

*****

a ***

*

*** *

65

* ***

********

*** Correct

****

*** out

**

****

****

question ******** ***** **** the

sample

********** ****

***

value of

used

** **** *** hypothesis **** *** ********** *********** *** ****** ** * 507 ** = 140 ** * **** x2 *

***

****** *****

a

0566 b 0257 c 0353 d ***** ******** 21 ******** Mark *** *** of **** **** ********* Question ***** ******* *** **** ********* **** to **** ***

null

hypothesis **** ** a vote ** *** ***** Water **** *** ** *** 2005 ********* ***** *** *** **** ***** *** ** *** *** ***********

*****

on *** ***** ****** ***** * ***** * ***** c ***** d ***** Question *** ******** Mark *** *** of **** **** question ******** text Determine *******

the

samples *** *********** or ******* ** matched ***** ********** ******** The ************* of * new headache medicine is tested by ********* *** ****** ** **** ****** ***

headache

** *****

***

********

***

use the medicine and another

*****

** patients

***

use *

*******

drug ****** ***** * *********** ******** * ******* ****** ******** 23 ******** Mark 100 *** of 100 **** question Question ***** *** *** **** **** are ********* **** ** the ******* ****** * 129 ***

107

129 ****

*

*** ***

***

*** 123

******

one: *

***

b ***

*

*** *

***

********

24

******** **** *** *** **

****

**** *********

********

text ******

that

*** **** ** test *** ***** **** the paired data **** **** a ********** *** ***** *** **** **********

**

******* *** *****

**

*** **** statistic

x

** * 13

*

** y 8

7

9 *

**

****** *****

a

* *

*****

* *

*

***** c

*

= *****

*

*

*

***** ******** *** ******** ****

100

*** **

****

**** *********

********

text Given *** ****** *********** coefficient * *** *** sample **** n ********* *** ******** value ** * *** *** your ******* to state ******* ** *** the ***** * represents * *********** ****** *********** *** a ************

level

** 005

r

* -0568

*

* ***

Select

***** *

********

values: *

*

************ ***********

******

************

*

******** ******* * = ************

significant

****** ************

*

Critical *******

r

* ************ ** *********** ****** correlation d ******** ******* r * ************ ** *********** linear ************ ******** *** ******** Mark *** out of **** **** ********* ******** ***** The ********** ******** ******** to attitude rating(x) and job *********** ****** *** *** *** ********* ** * ******* ** ** *

117

* ****

Ten

pairs of ****

****

used ** ******

***

******** ***

****

****

*****

r * **** and y

*

*** What

**

*** best

*********

*** *********** ****** *** * person ***** ******** ****** is 70?

Select

one: * 801 * 819 *

****

d 126 ******** 27 ******** ****

***

*** **

****

Flag *********

********

text The

************

of *

refrigerator

****** ***

****

**** produces

*************

****

***

******** ** maintain * ****

mean

*********** *******

**

******** ideal

***

* ******* **** ** ****** ******* *** ***** of *** ******* **** not agree **** *** ************ ************ *** claims ** can ***** that the **** **** temperature is

incorrect

****** ***** * *** ******* *

********

*** ******* * ******** b ***

***********

******** ***

*******

**** ******** * ***

*******

* ******** *** µ

******** * H0: *******

48° H1: µ< ********

Question

*** ********

****

***

***

** **** **** ********* Question

*****

*** ***

*****

*********** **

****

the *********** ** determination Find the *********** ** ************* ***** **** the ***** ** *** ****** correlation *********** * ** -0721 ****** ***** * ***** * 0480 c ***** * ***** Question *** Correct Mark *** *** ** **** Flag

*********

Question ***** *** *** ***** ****

**

**** the

********

** *** ********** line ***** *** ***** ****** **

three

*********** ****** if ********** x * * ** *

9

* 143 116 *** 98 *** ****** ***** * **

=

**** – 68x b ** * ***** * **** *

**

* *****

*

***

**

d ** * **** *******

****

******** ***

********

**** 100

out

** 100 **** question Question text A ********** ****** ** **** ******* *** ********** ** ******* students who ***** ** *** **** ** **** ********* ******** *** ******** ******* *** students **** **** ******* and ******* *** ****** that smoke The results *** ***** ****** ******* * ******* B ******* * ******* ** ***** ** ** ** *** ********* smoke **

74

** ***

***

a ***

significance

level **

****

*** *****

****

*** **********

of

******** *******

is

the

same

** all **** ******** **

***

test **********

x2

* ******

Select

***** a ****** the null ********** ***** ** *** sufficient evidence ** ******* rejection ** *** ***** **** *** proportion ** ******** smoking is *** same ** *** **** ********* * ** not ****** *** **** ********** ***** ** ************ evidence to ******* ********* ** *** ***** **** *** ********** ** students smoking is ***

****

** ***

****

********* c ** *** ******

***

**** ********** ***** is

in

sufficient ******** ** *******

*********

of the ***** ****

***

********** ** students ******* **

***

**** ** *** four

*********

d ****** *** **** hypothesis

*****

** sufficient evidence

**

warrant *********

**

***

*****

**** *** ********** ** students

*******

** ***

****

** ***

****

********

Click here to download attached files: Rasmussen STA3140 final exam 2016.docx
or
LEARN MORE EFFECTIVELY AND GET BETTER GRADES!