1.When testing for the significance of the difference between two sample means, the null hypothesis can be stated as

a.mc043-1.jpg = mc043-2.jpg

b.m > 0

c.m1 = m2

d.s1 = s2

2.When conducting hypothesis tests for two sample means, the test statistic is

a.alpha.

b.the difference in sample means.

c.the degrees of freedom.

d.the difference in the population means.

3.When testing for the significance of the difference between sample means with small samples, the proper sampling distribution is

a.the alpha distribution.

b.the beta distribution.

c.the Z distribution.

d.the t distribution.