A real estate company is interested in testing whether the mean time that families in City A have been living in their current homes is less than families in City B. Assume that the two population variances are equal. A random sample of 100 families from City A and a random sample of 150 families in City B yield the following data on length of residence in current homes. What is the test statistic for the difference between sample means? Round to two decimal places. City A: XA = 35 months, $2 =900 City B: XB =50 months, S = 1050 O A. - 8.75 O B. - 1.96 O C. -2.33 O D. - 3.69 Click to select your