Hypothesis Testing Exam Questions and answers / Hypothesis Testing 2 sets combined with complete solution 2025/2026

Hypothesis Tes ng Exam Ques ons and answers /
Hypothesis Tes ng 2 sets combined with complete
solu on 2025/2026
A method for tes ng a claim or hypothesis about a parameter in a popula on, using data
measured in a sample, is called:

A) the central limit theorem

B) hypothesis tes ng

C) significance tes ng

D) both b and c - D



The __________ hypothesis is a statement about a popula on parameter, such as the
popula on mean, that is assumed to be true.

A) null

B) alterna ve

C) true

D) false - A



A researcher sets the following criterion: When the probability of obtaining a sample mean
would be less than 5% if the null hypothesis were true, we reject the value stated in the null
hypothesis. What is the 5% criterion called?

A) the sample mean

B) the test sta s c

C) the p value

D) the level of significance - D

, A researcher computes a test sta s c and determines that the probability of obtaining a
sample mean, given that the value stated in the null hypothesis is true, is .02. The .02 refers to
what value?

A) the value of the sample mean

B) the value of the test sta s c

C) the p value

D) the level of significance - C



When a decision is to reject the null hypothesis, the result is:

A) significant

B) not significant - A



A researcher incorrectly decides to retain a null hypothesis that is actually false. The researcher
has commi+ed a:

A) Type I Error

B) Type II Error

C) Type III Error

D) all of the above - B



A researcher incorrectly decides to reject a null hypothesis that is actually true. The researcher
has commi+ed a:

A) Type I Error

B) Type II Error

C) Type III Error

D) all of the above - A



The level of significance for a hypothesis test is:

, A) the probability of incorrectly rejec ng the null hypothesis

B) the probability of commi.ng a Type I error

C) the alpha level

D) all of the above - D



Researchers state an alpha level, thereby directly controlling for which type of error?

A) Type I Error

B) Type II Error

C) Type III Error

D) all of the above - A



A researcher conducts a one-sample z-test at a .05 level of significance. If the rejec on region is
placed in both tails, then what are the cri cal values for this hypothesis test?

A) 1.645

B) 1.96

C) 2.58

D) 3.30 - B



A researcher obtains z = 1.68 using a one-sample z-test. What is the decision for the hypothesis
test at a .05 level of significance?

A) retain the null

B) reject the null

C) it depends on whether the test is one-tailed or two-tailed - C



A researcher computes a one-sample z-test. If the test is a nondirec onal hypothesis test, then
the cri cal value is placed in:

A) the upper tail of the standard normal distribu on