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The Wall Street Journal reported that of taxpayers with adjusted gross incomes between and itemized deductions...

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Basic Math

The Wall Street Journal reported that of taxpayers with adjustedgross incomes between and itemized deductions on their federalincome tax return. The mean amount of deductions for thispopulation of taxpayers was . Assume that the standard deviation is. Use z-table. a. What is the probability that a sample oftaxpayers from this income group who have itemized deductions willshow a sample mean within of the population mean for each of thefollowing sample sizes: , , , and ? Round your answers to fourdecimals. b. What is the advantage of a larger sample size whenattempting to estimate the population mean? Round your answers tofour decimals. A larger sample the probability that the sample meanwill be within a specified distance of the population mean. In theautomobile insurance example, the probability of being within ofranges from for a sample of size to for a sample of size .

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AssumingThe Wall StreetJournal reported that 33 of taxpayers with adjusted gross incomesbetween 30000 and 60000 itemized deductions on their federalincome tax return The mean amount of    See Answer
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