Within what limits will 90 percent of sample means occur/Statistics
Determine the probability value using normal distribution.
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 sample mean is at least $25.00?
b. What is the likelihood sample mean is greater than $22.50 but less than $25.00?
c. Within what limits will 90 percent of sample means occur?
