For the year 2010, 33% of taxpayers with adjusted gross incomes between $30,000 and $60,000 itemized deductions on their federal income tax return. The mean amount of deductions for this population of taxpayers was $16,642. Assume that the standard deviation is = $2,300. If required, round your answer to two decimal places.

(a)

What are the sampling distributions of x for itemized deductions for this population of taxpayers for each of the following sample sizes: 30, 50, 100, and 400?

E(x) = $ _______

n	(x)
30	$
50	$
100	$
400	$

(b)	What is the advantage of a larger sample size when attempting to estimate the population mean?
	A larger sample _______ the standard error and results in a ________ precise estimate of the population mean.