Refer to the Buena School District bus data You may find the

Refer to the Buena School District bus data: You may find the data set under www.mhhe.com/lindbasic8e: go under the tab and click student, then you scroll down to ch. seven, next take the mouse and click data set, and lastly make sure you click the data set related to the problem: Buena school district

a. Refer to the maintenance cost variable. The mean maintenance cost for last year is $450.29, with a standard deviation of 53.69. Estimate the number of buses with a cost of more than $500. Compare that with the actual number.

b. Refer to the variable on the number of miles driven. The mean is 830.11 and the standard deviation is 42.19 miles. Estimate the number of buses traveling more than 900 miles. Compare that number with the actual value.

Below are the questions I need answered:

56.a.1 Given a mean monthly maintenance of $450.29 with a standard deviation of $53.69 and using the normal distribution, estimate the number of busses with a monthly maintenance cost more than $500.

56.a.2 Compare the estimate from 56.a.1 to the actual results and suggest if the estimate is a good yield. Explain your answer.

56.b.1 Given a mean miles of 830.11 with a standard deviation of 42.19 miles and using the normal distribution, estimate the number of busses traveling more than 900 miles .

54.b.2 Compare the estimate to the actual results and suggest if the estimate is a good yield. Explain your answer

Thanks again!

Solution