A population has a standard deviation of 34. We take a random sample of size 30 from this population. Let Xbar be the sa

Post by **answerhappygod** » Wed Jul 13, 2022 5:06 am

A population has a standard deviation of 34. We take a randomsample of size 30 from this population. Let Xbar be the sample meanand let Xtot be the sample sum of our sample. These are randomvariables.a) What is the variance of this population? b) What is the variance of Xtot? (to three decimalplaces) c) What is the standard deviation of Xtot? (to three decimalplaces) d) What is the variance of Xbar? (to three decimalplaces) e) What is the standard deviation of Xbar? (to three decimalplaces) f) What is the smallest sample size, n, which will make thestandard deviation of Xtot at least 900? g) What is the smallest size sample, n, which will make thevariance of Xtot at least 90000? h) Copy your R script for the above into the text box here.