Exam (elaborations)
Elementary Statistics (STATs 2023) Module 5 Exam Practice Test
- Course
- Elementary Statistics
- Institution
- St. Petersburg College
Elementary Statistics (STATs 2023)
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Module 5 TestSelect the most appropriate response.
_____ 1. It is claimed that the mean age of bus drivers in Chicago is 50.2 years. If a hypothesis test is
performed, how should you interpret a decision that rejects the null hypothesis?
a) There is not sufficient evidence to support the claim μ = 50.2.
b) There is not sufficient evidence to reject the claim μ = 50.2.
c) There is sufficient evidence to support the claim μ = 50.2.
d) There is sufficient evidence to reject the claim μ = 50.2.
Select the most appropriate response.
It is claimed that the mean age of bus drivers in Chicago is 59.3 years. If a hypothesis test is
_____ 2. performed, how should you interpret a decision that fails to reject the null hypothesis?
a) There is not sufficient evidence to reject the claim μ = 59.3.
b) There is sufficient evidence to reject the claim μ = 59.3.
c) There is not sufficient evidence to support the claim μ = 59.3.
d) There is sufficient evidence to support the claim μ = 59.3.
Select the most appropriate response.
_____ 3. In hypothesis testing, what is the function of a critical value that is obtained from the tables?
a) It is equal to the calculated statistic from the observed data.
b) It is the point on the number line where the decision changes from reject to fail to reject.
c) It is the center of the distribution of X's.
d) It is the point that is 1 standard deviation away from the mean.
Determine the critical value.
_____ 4. Using the z-tables (or t-tables), determine the critical value for the left-tailed z-test with = 0.01.
a) -2.326
b) 2.326
c) 2.576
d) -2.576
, Select the most appropriate response.
_____ 5. Which type of alternative hypothesis would have the critical region shown in the figure below?
a) H1 : k
b) H1 : k
c) H1 : k
d) H1 : = k
True or False.
_____ 6. If the p-value is less than alpha, the null hypothesis should be rejected.
a) True
b) False
Select the most appropriate response.
_____ 7. What type of error is made if you reject the null hypothesis when the null hypothesis is actually true?
a) Type I error
b) Type II error
c) significant error
d) critical error
Select the most appropriate response.
_____ 8. What type of error is made if you fail to reject the null hypothesis when the null hypothesis is actually
false?
a) Type I error
b) Type II error
c) significant error
d) critical error
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