Question

1.- A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test?

	a.	​Reject the null hypothesis with α = .05 but not with α = .01
	b.	​Reject the null hypothesis with both α = .05 and α = .01
	c.	​Fail to reject the null hypothesis with both α = .05 and α = .01
	d.	​Cannot make a decision without additional information

2.- Compute the Pearson correlation ( r ) for the following data.
X 2 3 6 4
Y 3 1 5 4

a. SSX = 15, SSY = 15, SP = 10, r = 0.400
b. SSX = 10, SSY = 10, SP = 5, r = 0.500
c. SSX = 20, SSY = 20, SP = 5, r = 0.800
d. Need more information

3.- A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test?
a. Reject the null hypothesis with α = .05 but not with α = .01
b. Reject the null hypothesis with both α = .05 and α = .01
c. Fail to reject the null hypothesis with both α = .05 and α = .01
d. Cannot make a decision without additional information

4.- What value is estimated with a confidence interval using the t statistic?​

	a.	​The value for an unknown sample mean
	b.	​The value for an unknown population mean
	c.	​The difference between two population means
	d.	​The difference between two sample means

Answer 1

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