Suppose that we reject a null hypothesis at the 0.05 level of significance. Then for which of the following $\alpha-$values do we also reject the null hypothesis?
A. 0.03
B. 0.02
C. 0.06
D. 0.04

A professor of statistics refutes the claim that the average student spends 3 hours studying for a midterm exam. Which hypothesis is used to test the claim?
A. $H_0: \mu = 3, H_1: \mu \not= 3$
B. $H_0: \mu = 3, H_1: \mu < 3$
C. $H_0: \mu \not= 3, H_1: \mu > 3$
D. $H_0: \mu \not= 3, H_1: \mu = 3$