How do the ratings for TV, phone, and Internet services compare? The data in Telecom2 represent the.
Source: Data extracted from “Ratings: TV,
Phone, and Internet Services,” Consumer Reports, May 2013, pp. 24–25.
a. At the 0.05 level of significance,
determine whether there is evidence of a difference in the mean rating between
TV, phone, and Internet services.
b. If appropriate, use the Tukey procedure
to determine which services’ mean ratings differ. Again, use a 0.05 level of