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
Q 10: In order to gather the opinion of students regarding online assignments, data will be collected from STAT 1000 students who are currently registered in the course. An email survey will be sent to all students currently enrolled in the course. Responses will be recorded for those that completed the survey. This is an example of:
Select one:
a. Voluntary response sample
b. Stratified sample
c. Simple random sample
d. Convenience sample
e. Systematic sample
Q 3: 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
Q 11: The proportion of right-handed students in a university population is 0.20, the probability of obtaining exactly 2 right handed people in a random sample of 4 is
Select one:
a. 0.381
b. 0.563
c. 0.051
d. 0.154
e. 0.432
Q 12: A sprinter runs the 100 yard dash on four separate occasions. The times (in seconds) are:
15.0 13.0 18.0 14.0
What is the value of the standard error of the mean for the runners time (in seconds)?
Select one:
a. 1.08
b. 0.99
c. 2.16
d. 3.23
e. 0.25
Q 13: The mean yield of alfalfa from a particular plot of land has been stable at 25 kilograms. The agronomist believes that a new fertilizer will result in an increased yield of alfalfa. The agronomist tested the new fertilizer on 16 equal sized plots of land and determines the yield to be 25.4 kilograms. What is the appropriate hypothesis for this test?
Select one:
a.
H0: x̄ = 25 vs. Ha: x̄ ≠ 25
b. H0: µ = 25 vs. Ha: µ < 25
c. H0: x̄ = 25 vs. Ha: x̄ < 25
d. H0: µ = 25 vs. Ha: µ ≠ 25
e. H0: µ = 25 vs. Ha: µ > 25
Q 14: A simple random sample generated 12 male and 18 female adults identified by their primary care physicians as being over-weight. These adults were fed a special high protein diet for a month and had a sample mean weight loss of 10 pounds with a sample standard deviation of 3.2 pounds. We would like to conduct a test to determine whether the average weight loss for all adults is less than 11 pounds at a 1% level of significance.
What is the appropriate hypothesis for this test?
Select one:
a. Ho: μ ≠ 11 vs Ha: μ = 11
b. Ho: μ = 11 vs Ha: μ ≠ 11
c. Ho: μ < 11 vs Ha: μ = 11
d.
H0: x̄ = 11 vs. Ha: x̄ ≠ 11
e. Ho: μ = 11 vs Ha: μ < 11
Q15 :A simple random sample generated 12 male and 18 female adults identified by their primary care physicians as being over-weight. These adults were fed a special high protein diet for a month and had a sample mean weight loss of 10 pounds with a sample standard deviation of 3.2 pounds. We would like to conduct a test to determine whether the average weight loss for all adults is less than 11 pounds at a 1% level of significance.
What would be the appropriate test statistic?
Select one:
a. confidence interval using t
b. one-sample z-test
c. one-sample t-test
d. confidence interval using z
e. matched paired test
Q 17: Assume that you are conducting a test with the following hypothesis
Ho: μ = 11 vs Ha: μ < 11. The test statistic for the test is t = -2.96 with a sample size of 30.
What is the p-value for this test?
Select one:
a. between 0.100 and 0.050.
b. between 0.005 and 0.01
c. between 0.02 and 0.01
d. between 0.05 and 0.025
e. between 0.0025 and 0.005
Q 18: If for a test the P-value is between 0.025 and 0.05, what conclusion can you draw?
Select one:
a. We would not reject Ho at α = 0.05 level of significance.
b. We would reject Ho at α = 0.01 level of significance
c. We would reject Ho at α = 0.005 level of significance.
d. We would not reject Ho at α = 0.01 level of significance.
