How do the ratings for TV, phone, and Internet services compare? The data in Telecom2 represent the.

How do the ratings for TV, phone, and
Internet services compare? The data in Telecom2 represent the mean ratings in
13 different cities

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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
significance.