QUESTION 11 4 points A real estate company is interested in testing whether the mean time that families in Gotham have been living in their current homes is less than families in Metropolis. Assume that the two population variances are equal. A random sample of 100 families from Gotham and a random sample of 150 families in Metropolis yield the following data on length of residence in current homes. Gotham: X =35 months, S = 30 months Metropolis: x =50 months, S= 33 months What is the estimated standard error of the difference between the 2 sample means? (Hint: Use StatCrunch) O A. 4 O B. 6 O C. 16 OD. 8At one school, the average amount of time tenth-graders spend watching television each week is 21.6 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal performs a signicance test using a= 0.05 to determine whether the average amount of time spent watching television per week has decreased. The hypotheses are: H0: u = 21.6 hours v.s. HA: u