# Question: The average annual expense for groceries in a 2012 random

The average annual expense for groceries in a 2012 random sample of 600 US households is $8562. If the standard deviation of grocery expenses in the population of US households is $1230, compute the

a. Standard error of the sampling distribution of the sample mean that could be used here to estimate the population mean.

b. Margin of error in a 90% confidence interval estimate of the mean annual grocery expense for all American households.

c. Suppose sample size was 1200 rather than 600. Compute the margin of error and the standard error for a 90% confidence interval.

a. Standard error of the sampling distribution of the sample mean that could be used here to estimate the population mean.

b. Margin of error in a 90% confidence interval estimate of the mean annual grocery expense for all American households.

c. Suppose sample size was 1200 rather than 600. Compute the margin of error and the standard error for a 90% confidence interval.

**View Solution:**## Answer to relevant Questions

The Census Bureau of the US Department of Commerce estimated that average e-commerce sales for US retailers in the second quarter of 2011 had increased by 3.0 percent from the first quarter of 2011. Along with the estimate, ...Use the t table to determine the following t values: a. 99% of the values in a t distribution with 18 degrees of freedom will be less than or equal to ______. b. 1% of the values in a t distribution with 10 degrees of ...The marketing division at Apex Telecom consists of four people. Two of the four will be randomly selected to attend a sales conference at the end of the year. If we designate the four people in the division as W, X, Y, and ...The following list shows the five stocks that make up your stock portfolio. Each stock is identified as either a growth stock or a value stock. You plan to select a random sample of three of the stocks to research. List all ...Listed here are the six members of the Council of Oil and Petroleum Exporting Countries: Argentina, Bahrain, Colombia, Dubai, Ecuador, and Oman. You plan to take a sample of these member countries in order to estimate the ...Post your question