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 24%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following viewing audience data: ABC 94 homes, CBS 66 homes, NBC 86 homes, and independents 54 homes. Test with = .05 to determine whether the viewing audience proportions changed. Round your answers to two decimal places.
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