The t test for independent samples involves how many groups?

		Two
		Three
		More than three
		Any number of groups

In the following, what are the degrees of freedom: t₍₂₉₎ = 2.001, p < .05?

29,

30,

31,

32

In the equation t ₍₇₈₎ = 1.03, p < .01, what does 78 represent?

		Test statistic
		Degrees of freedom
		Obtained value
		Alpha level

In the equation t ₍₇₈₎ = 1.03, p < .01, what does "p < .01" represent?

		The obtained value
		The critical value
		The degrees of freedom
		The level of significance

In a t-test for dependent samples that examines the difference between a pretest and posttest, what type of hypothesis is used?

		Nondirectional
		Directional
		Null hypothesis
		Experimental