11.71 Cell Phones How satisfied are you set with your current cell phone service provider? Surveys indicate that there is a high level of dissatis- faction among consumers, resulting in high customer turnover rates. The table shows the overall satisfaction scores, based on a maximum score of 100, for four service providers in four different cities.Surveys indicate that there is a high level of dissatis- faction among consumers, resulting in high customer turnover rates. The table shows the overall satisfaction scores, based on a maximum score of 100, for four service providers in four different cities.

a. What type of experimental design was used in this arti- cle? If the design used is a randomized block design, what are the blocks and what are the treatments?

b. Conduct an analysis of variance for the data.

c. Are there significant differences in the average satisfaction scores for the four wireless providers considered here?

d. Are there significant differences in the average satisfaction scores for the four cities?

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Vancouver Halifax Toronto Regina Bell 63 66 61 64 Rogers 67 67 64 60 Telus 60 68 60 61 Virgin Mobile 71 75 73 73