The accompanying table contains the service ratings of 14 different internet and tv providers. Complete parts (a) through (d) below.

Provider TV Internet

1 66 69

2. 64 65

3. 64 67

4. 68 71

5. 77 78

6. 61 63

7. 56 57

8. 74 76

9. 53 55

10. 69 72

11. 63 66

12. 73 75

13. 74 78

14. 62 66

a) the test statistic is Tstat =

b) the p-value is =

c) construct and interpret a 99% confidence interval estimate of the difference in the mean rating between TV and Internet Services