Question

How do the ratings of TV and Internet services compare? The file Telecom contains the rating of 14 different providers. (Data extracted from “Ratings: TV, Phone, and Internet Services,” Consumer Reports, May 2014, pp. 28– 29.)
a. At the 0.05 level of significance, is there evidence of a difference in the mean service rating between TV and Internet services?
b. What assumption is necessary about the population distribution in order to perform this test?
c. Use a graphical method to evaluate the validity of the assumption in (a).
d. Construct and interpret a 95% confidence interval estimate of the difference in the mean service rating between TV and Internet services.


$1.99
Sales2
Views114
Comments0
  • CreatedJuly 16, 2015
  • Files Included
Post your question
5000