A research assistant is conducting a one-independent sample t-test (lower tail critical). Assuming = .05, what would the critical value be?

a. There is not enough information to answer.

b. 3.169

c. 2.365

d. 1.812

A principle investigator conducts a two-independent sample t-test. She determines that the degrees of freedom is 7. Assuming = .05, what would the critical value be?

a. -1.8663

b. 0.703

c. 2.365

d. 3.499

When a researcher is using a large sample to conduct a one-independent sample t test, what assumption becomes less critical?

a. random sampling

b. equal variances

c. normality

d. independence

Two researchers (A and B) compute a one-sample t test. In both tests, H0: = 10, however the degrees of freedom is smaller for Researcher B. Which test is more likely to result in a decision to reject the null hypothesis?

a. There is not enough information to answer this question.

b. Researcher B

c. Researcher A

d. Both researchers will choose to retain the null hypothesis.