# Question

Refer to Exercise 5.14. Suppose the mayor's staff reviews the proposed survey and decides that in order for the survey to be taken seriously the requirements need to be increased.

In exercise 5.14 The housing department in a large city monitors the rent for rent- controlled apartments in the city. The mayor wants an estimate of the average rent. The housing department must deter-mine the number of apartments to include in a survey in order to be able to estimate the average rent to within $ 100 using a 95% confidence interval. From past surveys, the monthly charge for rent- controlled apartments ranged from $ 1,000 to $ 3,500.

a. If the level of confidence is increased to 99% with the average rent estimated within $ 50, how many apartments need to be included in the survey?

b. Suppose the budget for the survey will not support increasing the level of confidence to 99%. Provide an explanation to the mayor, who has never taken a statistics course, of the impact on the accuracy of the estimate of the average rent of not raising the level of confidence from 95% to 99%.

In exercise 5.14 The housing department in a large city monitors the rent for rent- controlled apartments in the city. The mayor wants an estimate of the average rent. The housing department must deter-mine the number of apartments to include in a survey in order to be able to estimate the average rent to within $ 100 using a 95% confidence interval. From past surveys, the monthly charge for rent- controlled apartments ranged from $ 1,000 to $ 3,500.

a. If the level of confidence is increased to 99% with the average rent estimated within $ 50, how many apartments need to be included in the survey?

b. Suppose the budget for the survey will not support increasing the level of confidence to 99%. Provide an explanation to the mayor, who has never taken a statistics course, of the impact on the accuracy of the estimate of the average rent of not raising the level of confidence from 95% to 99%.

## Answer to relevant Questions

A study is designed to test the hypotheses H0: μ ≥ 26 versus Ha: μ ≥ 26. A random sample of 50 units was selected from a specified population, and the measurements were summarized to y = 25.9 and s = 7.6. a. With α = ...Refer to Exercise 5.24. Suppose a random sample of 100 students is selected yielding y-bar = 542 and s = 76. Is there sufficient evidence to conclude that the mean mathematics achievement level has been increased? Explain. A tobacco company advertises that the average nicotine content of its cigarettes is at most 14 milligrams. A consumer protection agency wants to determine whether the average nicotine content is in fact greater than 14. A ...Refer to Exercise 5.39. In exercise a. Does the normality of the data appear to be valid? b. How close to the true value were your bounds on the p-value? c. Is there a contradiction between the interval estimate of μ and ...Refer to Exercise 5.52. In exercise The lobbyist for the business group has his expert examine the experimental equipment and determines that measurement errors may have been made when recording the reaction times. Unless ...Post your question

0