A population of 1,000 students spends an average of $10.50 a day on dinner.

A population of 1,000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken.

a. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean? Explain the reason. Which theorem ensures the shape of the sampling distribution?

b. What is the probability that these 64 students will spend a combined total of more than $715.21?

c. What is the probability that these 64 students will spend a combined total between $703.59 and $728.45?

Expert Solution

orchestra answered 2 years ago

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