Question

1.23) A population distribution of scores has a mean = 50 and a standard deviation of...

1.23)

A population distribution of scores has a mean = 50 and a standard deviation of 4. Researchers plan to take a sample size of N = 64. Based on the central limit theorem, 68.26% of all possible sample means are between the sample means of ______.

a.

46 and 54

b.

42 and 58

c.

49.5 and 50.5

d.

47 and 53



1.32)

With a p value of .10 and an α of .05, should you reject or fail to reject the null hypothesis?

a.

reject

b.

fail to reject

1.33)

With an obtained z score 1.78, an α of .05, and a critical value of 1.65 should you reject or fail to reject the null hypothesis?

a.

reject

b.

fail to reject

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