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For the year 2 0 1 0 , 3 3 % of taxpayers with adjusted gross incomes between $ 3 0 , 0 0 0

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 \sigma = $2,400. If required, round your answer to two decimal places.
(a) What are the sampling errors 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 \sigma 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
- Select your answer -
the standard error and results in a(n)
- Select your answer -
precise estimate of the population mean.

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