According to the local real estate board, the average number of days that homes stay on the market before selling is 78.4 with a standard deviation equal to 11 days. A prospective seller selected a random sample of 36 homes from the multiple listing service. Above what value for the sample mean should 95 percent of all possible sample means fall?

Answer 1

78.4-+ 1.96*11/sqrt(36))

(74.81, 81.99)

Answer 2

78.4-+ 1.96*11/sqrt(36))

(74.81, 81.99)