# Question: The mean amount purchased by a typical customer at Churchill s

The mean amount purchased by a typical customer at Churchill’s Grocery Store is $23.50, with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions.

a. What is the likelihood the sample mean is at least $25.00?

b. What is the likelihood the sample mean is greater than $22.50 but less than $25.00?

c. Within what limits will 90% of the sample means occur?

a. What is the likelihood the sample mean is at least $25.00?

b. What is the likelihood the sample mean is greater than $22.50 but less than $25.00?

c. Within what limits will 90% of the sample means occur?

## Answer to relevant Questions

Suppose we roll a fair die two times.a. How many different samples are there?b. List each of the possible samples and compute the mean.c. On a chart similar to Chart 8–2, compare the distribution of sample means with the ...Refer to the Real Estate data, which report information on the homes sold in the Goodyear, Arizona, area last year. Use statistical software to compute the mean and the standard deviation of the selling prices. Assume this ...The owner of the West End Kwick Fill Gas Station wishes to determine the proportion of customers who use a credit card or debit card to pay at the pump. He surveys 100 customers and finds that 80 paid at the pump.a. Estimate ...Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer ...Refer to the Baseball 2012 data, which report information on the 30 Major League Baseball teams for the 2012 season. Assume the 2012 data represents a sample.a. Develop a 95% confidence interval for the mean number of home ...Post your question