During the first 13 weeks of the television season, the Saturday evening 8:00 P.

Question

During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 30%, CBS 28%, NBC 25%, and independents 17%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following viewing audience data: ABC 94 homes, CBS 65 homes, NBC 82 homes, and independents 59 homes. Test with = .05 to determine whether the viewing audience proportions changed. Use Table 12.4. Round your answers to two decimal places. ? 2 = 7.11 p-value is between . Conclusion:

Explanation / Answer

Ans:

Test statistic:

Chi square score=6.38

p-value=CHIDIST(6.38,3)=0.0945

As,p-value>0.05,we fail to reject the null hypothesis and there is not sufficient evidence to conclude that  the viewing audience proportions changed.

Category Observed pi Expected (O-E)^2/E ABC 94 0.3 90 0.18 CBS 65 0.28 84 4.30 NBC 82 0.25 75 0.65 Independents 59 0.17 51 1.25 Total= 300 1 300 6.38

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