An internal study by the Technology Services department at Lahey

Using the sign test, if (1) H1 is directional, (2) H0 is false, (3)  = 0.01, and (4) N = 12, then the probability of making a Type I error equals ____.

	0.0002
	0.0010

	0.0192
	0

In a nondirectional alternative hypothesis, evaluating the probability of observing 7 pluses out of 8 events equals ____.

	p(7) + p(8)
	p(0) + p(8)

	p(0) + p(1) + p(7) + p(8)
	p(7)

Exhibit 10-2 Refer to the following hypothetical data collected using replicated measures design:

Subject	1	2	3	4	5	6	7	8	9	10
Pre	50	49	37	16	80	42	40	58	31	21
Post	56	50	30	25	90	44	60	71	32	22

Refer to Exhibit 10-2. In a two-tailed test of H0 using  = 0.05, what is p(obtained) for the results shown?

	0.1094
	0.0108

	0.0500
	0.0216

In an experiment in which H1 is nondirectional, and the state of reality is such that the probability of a plus = 0.50, the probability of making a Type II error is ____.

	0
	1  alpha

	1
	need more information

If H1 is nondirectional and the size of the effect of the independent variable decreases, the probability of making a Type I error ____.

	decreases
	increases

	need more information
	equals zero