Assume that the standard deviation is =$2,480. If required, round your answer to two decimal places. (a) What are the sampling errors of x for itemized deductions for this population of taxpayers for each of the following sample sizes: 30, 50, 100, and 400? E(x)=$ (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(n) precise estimate of the population mean