I have Statistics 1000, which is a first year university course exam going on right now. I need someone to finish it in 2 hours and stay connected with me as I will copy and paste each question so I n

A bowler plays one game every day for one month. His scores are ordered and are shown

below:

148, 150, 157, 164, 165, 166, 171, 178, 179, 179, 181, 182, 183, 185, 185

189, 190, 190, 190, 191, 193, 195, 200, 202, 207, 212, 220, 225, 230, 235

the five-number summary for this data set is:

148 178 187 200 235

If an outlier boxplot was constructed, which scores would be labelled as the new minimum and/or maximum.

Select one:

a. 148 & 235

b. 232 & 235

c. 148

d. no outlier

e. 150 & 230

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A researcher would like to determine the relationship between drought length (lack of rain) and the size of a forest fire (fire intensity). It was found that as number of days without rain increased the risk of fire intensity also increased. The two variables were measured on a number of locations in California and a least squares regression line was calculated. It was report that 74% of the variation of fire intensity was explained by its regression on draught length. What is the value of the correlation between these two variables.

Select one:

a. 0.82

b. 0.42

c. -0.46

d. -0.82

e. 0.86

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A class of 40 students, 18 are males and 22 are females. For the final examination, 3 males and 5 females achieved a letter grade of A. What is the probability that a randomly selected student from the class achieved letter A grade or is a male student?

Select one:

a. 13/30

b. 22/40

c. 30/40

d. 25/40

e. 27/40

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The oxygen uptake for cardiac patients who regularly exercise follows a normal distribution with a mean of 24.1 ml/kg and a standard deviation of 6.30 ml/kg. What is the value of oxygen uptake of the top 14% of the population

Select one:

a. 30.90

b. -30.90

c. 1.08

d. 15.45

e. 0.14

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A physical-fitness association in Calgary Alberta is including the mile run in its secondary-school fitness test for girls. The time for this event is approximately normally distributed with a mean of 400 seconds and a standard deviation of 40 seconds. If the association wants to select the fastest 10% as “good”, what is the maximum time (in seconds) a runner will need in order to qualify as “good”?

Select one:

a. 451.2

b. 501.2

c. 348.8

d. 400

e. 334.2

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Two variables in a study are confounded if

Select one:

a. they are correlated

b. have a skewed distribution

c. No control is identified

d. their effects on the response variable can not be separated

e. it is unclear which one is the response variable and which one is the dependent variable

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Randomization is used in a randomized block design to:

Select one:

a. Select the individuals to participate in the experiment

b. Place the individuals into blocks

c. Select which treatments will be compared

d. Assign the treatments to the individuals within blocks

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Two doctors are known to agree 90% when doing independent assessments of patients. If they assess 6 patients, the probability they will agree exactly 4 times is:

Select one:

a. 0.221

b. 0.0639

c. 0.098

d. 0.0287

e. 0.0762

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The mean and standard deviation for the charge time of a random sample of 25 iPhones were found to be 23 and 2.5 hours respectively. Assuming that the charge time was normally distributed. A 99% confidence interval for the mean charge time is:

Select one:

a. 23 +/- 0.77

b. 23 +/- 0.91

c. 23 +/- 1.29

d. 23 +/- 1.25

e. 23 +/- 1.40

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The average numbers of surviving Quail chicks (offspring) is known to be two. Scientists would like to test if the survivorship of quail chicks in Manitoba has changed due to the exposure of a harmful toxin. They perform a hypothesis test using a known population standard deviation. The calculated value of the test statistic is -1.67. What is the P-value of the appropriate test statistic?

Select one:

a. 0.9525

b. 0.7190

c. 0.0475

d. 0.0950

e. 0.0401

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The distribution of systolic blood pressure (SBP) follows a normal distribution with a mean of 130 mm Hg (where Hg = mercury). In a random sample of 25 glaucoma (disease to the eye) patients, the average SBP was 136 mm Hg and the standard deviation was 15 mm Hg. We wanted to determine if the mean systolic blood pressure is higher for glaucoma patients. What is the appropriate test statistic and its value?

Select one:

a. t-test, 0.40

b. z-test, 0.40

c. z-test, -2.0

d. t-test, 2.0

e. z-test, 2.0

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A company packages drought beer in cans. The volume of the cans follow a normal distribution with a standard deviation of 2 ml. If 5% of the cans contain more than 358 ml of beer, what is the mean volume of the canned beers?

Select one:

a. 354.08

b. 372.04

c. 354.71

d. 362.29

e. 361.29

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A random variable X follows a uniform distribution with a mean of 4 and a standard deviation of 2.

We take a random sample of 100 individuals from this distribution and calculate the value of the sample mean . The sampling distribution of is:

Select one:

a. approximately normally distributed with mean 4 and standard deviation 2

b. uniform with mean 4 and standard deviation 0.2

c. uniform with mean 4 and standard deviation 2

d. approximately normally distributed with mean 4 and standard deviation 0.2

e. uniform with mean 4 and standard deviation 0.02

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Acidity (pH) of rain follows a normal distribution with a standard deviation of 3. In order to estimate the unknown population mean μ to within one unit with a confidence level of 95%, what would be the required sample size?

Select one:

a. 43

b. 35

c. 49

d. 36

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A simple random sample of size 64 is drawn from a normal population with a known standard deviation σ. The 95% confidence interval for the population mean μ is found to be (12, 16). The approximate population standard deviation σ is:

Select one:

a. 2

b. 67

c. 12

d. 8

e. 1

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According to the Canadian Blood Services (CBS) website 9% of Canadians have blood type O. If a sample of 8 donors is selected, what is the probability of obtaining at least one (1) that have type O blood inclusive?

Select one:

a. 0.3721

b. 0.4703

c. 0.5297

d. 0.6279

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Which of the following will reduce the margin of error for a confidence interval?

I. Decrease the sample size

II. Increase the sample size

III. Use a lower confidence level

Select one:

a. III only

b. II only

c. I and III

d. II and III

e. I only

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We would like to test the claim that less than 8% of Winnipeg driver receive a ticket for not stopping at a red light. A simple random sample of 300 drivers contained 15 who received a red light ticket. The value of the test statistic is:

Select one:

a. 1.93

b. 1.56

c. 2.91

d. -1.92

e. 2.38