Solutions Statistics

The mean amount purchased by each customer at Churchill’s Grocery Store is $23.50. The population is

Question: The mean amount purchased by each customer at Churchill’s Grocery Store is $23.50. The population is positively skewed and the standard deviation is not known. For a sample of 50 customers, answer the following questions.

a. If the standard deviation of the sample is $5.00, what is the likelihood the sample mean is at least $25.00?

b. Again, assume the sample standard deviation is $5.00. What is the likelihood the sample mean is greater than $22.50 but less than $25.00?

c. Again, assume the sample standard deviation is $5.00. Within what limits will 90 percent of the sample means occur?

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Solution: The solution consists of 2 pages
Solution Format: Word Document


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