The Neilsen Company, which issues television popularity rating reports, is interested in testing for differences in average viewer satisfaction with morning news, evening news, and late news. The company is also interested in determining whether differences exist in average viewer satisfaction with the three main net- works: CBS, ABC, and NBC. Nine groups of 50 randomly chosen viewers are assigned to each combination cell CBS-morning, CBS-evening, . . . , NBC-late. The viewers' satisfaction ratings are recorded. The results are analyzed via two- factor ANOVA, one factor being network and the other factor being news time. Complete the following ANOVA table for this study, and give a full interpretation of the results.
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Source ofVariation
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Sum ofSquares
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Degreesof Freedom
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Mean Square F Ratio
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Network
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145
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|
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News time
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160
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Interaction
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240
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Error
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6,200
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Total
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