



 
Hi Rick, I would use the chisquare test for this problem. You have a multinomial distribution with four categories, ABC, CBS, NBC and a cable chanel. The null hypothesis is that the the percentages of the TV audience in primetime are
The alternate hypothesis is that these percentages are not correct. You have a sample of size 500 so, under the null hypothesis the expected numbers are
The observed values are
Use these values to calculate the chisquare statistic and compare this value to the 5% critical number for the chisquare distribution with (the number of categories)  1 = 4  1 = 3 degrees of freedom. Penny  


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