Question

Last rating period, the percentages of viewers watching several channels between 11 P.M. and 11:30 P.M....

Last rating period, the percentages of viewers watching several channels between 11 P.M. and 11:30 P.M. in a major TV market were as follows:

WDUX
(News)
WWTY
(News)
WACO
(Cheers Reruns)
WTJW
(News)
Others
17% 24% 22% 15% 22%
Suppose that in the current rating period, a survey of 2,000 viewers gives the following frequencies:
WDUX
(News)
WWTY
(News)
WACO
(Cheers Reruns)
WTJW
(News)
Others
348 413 476 331 432
(a) Show that it is appropriate to carry out a chi-square test using these data.
  Each expected value is ≥   
(b)

Test to determine whether the viewing shares in the current rating period differ from those in the last rating period at the .10 level of significance. (Round your answer to 3 decimal places.)

  χ2

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