Unit 11 Hypothesis Tests Two Populations Quiz 2

If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05 a. Always b. Sometimes c. Never

a. Always

For a given hypothesis test, if we do not reject the null, and null is true. a. no error has been committed b. Type I error has been committed c. Type II error has been committed d. Type III error has been committed

a. no error has been committed

If a null hypothesis is rejected at a significance level of .05, it will ______ be rejected at a significance level of .01 a. Always b. Sometimes c. Never

b. Sometimes

If a null hypothesis is not rejected at a significance level of .05, it will ______ be rejected at a significance level of .01 a. Always b. Sometimes c. Never

c. Never

Which statement is incorrect? a. The null hypothesis contains the equality sign b. When a false null hypothesis is not rejected, a Type II error has occurred. c. If the null hypothesis is rejected, then we can conclud that the alternative hypothesis is true d. If we fail to reject the null hypothesis, then it is proven that null hypothesis is true.

d. If we fail to reject the null hypothesis, then it is proven that null hypothesis is true.