Question

The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50 with a standard deviati?

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 percent of the sample means occur?

3 years ago - 1 answers

Best Answer

Chosen by Asker

a. less than even odds.

b. less than a.

c. you can't figure out 90% of 23.50, and subtract that from 23.50, and add that to 23.50? You'll never pass the class.

3 years ago