Answer Happy

The accompanying table contains the service ratings of 14 different Internet and TV providers. Complete parts (a) through (d) below. Click the icon to view the data table. C I avia are nevessay. c. Use a graphical method to evaluate the validity of the assumption in (a). Construct a boxplot of the differences. Choose the correct graph below. OA. OB. Boxplot Boxplot -10 10 -10 0 Difference Difference Does the assumption needed in order to conduct the t test in (a) appear to be valid? ⒸA. No, the boxplot is approximately symmetric. OB. No, the boxplot indicates skewness. OC. Yes, the boxplot is approximately symmetric. OD. Yes, the boxplot indicates skewness. d. Construct and interpret a 95% confidence interval estimate of the difference in the mean service rating between TV and Internet services. Sμo S (Type integers or decimals. Round to three decimal places as needed.) Interpret this interval. Choose the correct answer below. OA. With 5% confidence, the difference in the mean service rating between TV and Internet services falls in the interval B. With 5% confidence, the mean service rating between TV and Internet services falls in this interval. OC. With 95% confidence, the difference in the mean service rating between TV and Internet services falls in the intervall. D. With 95% confidence, the service ratings for both TV and Internet services fall in this interval. HO C. -10 Boxplot 0: Difference 10