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Answer to Question #29628 in Statistics and Probability for Laticia Gordon
Question #29628
The mean amount purchased by a typical customer at Churchill's Grocery Store is $27.50 with a standard deviation of $7.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 68 customers, answer the following questions.
(a) What is the likelihood the sample mean is at least $30.00? Answer: 0.0016
(b) What is the likelihood the sample mean is greater than $26.50 but less than $30.00?
Answer: 0.8794
(c) Within what limits will 90 percent of the sample means occur?
Sample mean ? and ? (couldn't figure out the answer here).
(a) What is the likelihood the sample mean is at least $30.00? Answer: 0.0016
(b) What is the likelihood the sample mean is greater than $26.50 but less than $30.00?
Answer: 0.8794
(c) Within what limits will 90 percent of the sample means occur?
Sample mean ? and ? (couldn't figure out the answer here).
Expert's answer
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