2) The NAEP (National Assessment of Educational Progress) includes a short test of quantitative skills, covering basic arithmetic and the ability to apply it. Suppose a random sample of 60 young adult men are taken from a large population. (Assume = 60)
a) Describe the shape of the sampling distribution of . Justify your answer.

b) If the mean of the sample is 265, what is a 90% confidence interval?

c) If a 95% confidence interval is 256.82 to 287.18, what is the mean of the sample?

d) What does 95% confidence mean?

Question

2)	The NAEP (National Assessment of Educational Progress) includes a short test of quantitative skills, covering basic arithmetic and the ability to apply it.  Suppose a random sample of 60 young adult men are taken from a large population. (Assume = 60)
	a) Describe the shape of the sampling distribution of . Justify your answer.

	b) If the mean of the sample is 265, what is a 90% confidence interval?

	c) If a 95% confidence interval is 256.82 to 287.18, what is the mean of the sample?

	d) What does 95% confidence mean?