QUESTION 1

1. An independent-measures experiment uses one sample with n = 6 and a second sample with n = 10 to compare two experimental treatments. The t statistic from this experiment will have degrees of freedom equal to _____.

	a.	7
	b.	14
	c.	8
	d.	15

1 points

QUESTION 2

1. One sample has n = 8 and SS = 21 and a second sample has n = 8 and SS = 35. What is the pooled variance for the two samples?

	a.	56/14.
	b.	28
	c.	56
	d.	56/16

1 points

QUESTION 3

1. A researcher reports an independent-measures t statistic with df = 30. If the two samples are the same size (n ₁ = n ₂), then how many individuals are in each sample?

	a.	n = 30
	b.	n = 16
	c.	n = 31
	d.	n = 15

1 points

QUESTION 4

1. The data from an independent-measures research study produce a sample mean difference of 4 points and a pooled variance of 12. If there are n = 6 scores in each sample, then the value for the t statistic is _____.

	a.	4/8
	b.	1
	c.	2
	d.	4/2

1 points

QUESTION 5

1. An independent-measures study uses two samples, each with n = 7, to compare two treatment conditions. The t statistic for this study will have degrees of freedom equal to _____.

	a.	6
	b.	14
	c.	13
	d.	12

1 points

QUESTION 6

1. One sample has n = 8 scores with SS = 180 and a second sample has n = 4 scores with SS = 60. What is the estimated standard error for the sample mean difference?

	a.	v24
	b.	24
	c.	3
	d.	240

1 points

QUESTION 7

1. A researcher reports t(24) = 5.30 for an independent-measures experiment. How many individuals participated in the entire experiment?

	a.	24
	b.	12
	c.	26
	d.	25

1 points

QUESTION 8

1. One sample has n = 15 scores with SS = 54 and a second sample has n = 7 scores with SS = 26. What is the pooled variance for the two samples?

	a.	80/22
	b.	80/20
	c.	40/22
	d.	40/20

1 points

QUESTION 9

1. Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard error for the sample mean difference?

	a.	10
	b.	4
	c.	v20
	d.	8

1 points

QUESTION 10

1. An independent-measures research study with n = 6 subjects in each treatment has SS = 70 for treatment 1 and SS = 50 for treatment 2. For these data, the estimated standard error for sample mean differences equals _____.

	a.	4
	b.	120
	c.	2
	d.	12

1 points

QUESTION 11

1. An independent-measures research study uses two samples, each with n = 12, to compare two treatments. If the results are evaluated with a t statistic using a two-tailed test with a=.05, then what are the boundaries for the critical region?

	a.	t = 2.201
	b.	t = 2.074
	c.	t = 2.069
	d.	t = 2.228

1 points

QUESTION 12

1. What is the pooled variance for the following two samples? Sample 1: n = 6 and SS = 56 Sample 2: n = 4 and SS = 40

	a.	5
	b.	9.6
	c.	5
	d.	12

1 points

QUESTION 13

1. One sample has a variance of s ² = 6 and a second sample has a variance of s ² = 8. If the two samples are the same size ( n ₁ = n ₂), then what is the pooled variance for the two samples?

	a.	14
	b.	7
	c.	6
	d.	8

1 points

QUESTION 14

1. An independent-measures study produce sample means of M ₁ = 35 and M ₂ = 31 and a pooled variance of 25. For this study, Cohen's d = _____.

	a.	d = 4/5
	b.	d = 1/25
	c.	d = 25/4
	d.	d = 5/4

1 points

QUESTION 15

1. An independent-measures research study uses two samples, one with n = 10 and one with n = 12, to compare two treatments. If the results are evaluated with a t statistic using a one-tailed test with a = .01, then what is the boundary for the critical region?

	a.	t = 2.080
	b.	t = 2.074
	c.	t = 2.528
	d.	t = 2.086