Question 4 (20 Points): A marketing survey is to be planned to estimate
the proportion of all customers who would subscribe to a new
pay-per-view service that a cable TV plans to offer. The sample size for
the survey is to be decided to estimate this proportion within a margin
of error 2 percentage of points using a 95% confidence interval.
If the a priori guess of the proportion was 20%. What sample size should
be used? (10 pts.)
If no a priori guess of the proportion was available, what sample size
should be used? Why is this sample size larger than that found in part
(a)? (10 pts.)
Statistics Homework Solutions
#10865
General stats problem
Question 4 (20 Points): A marketing survey is to be planned to estimate the proportion of all customers who would subscribe to a new pay-per-view service that a cable TV plans to offer. The sample size for the survey is to be decided to estimate this proportion within a margin of error 2 percentage of points using a 95% confidence interval.
a) If the a priori guess of the proportion was 20%. What sample size should be used? (10 pts.)
If no a priori guess of the proportion was available, what sample size should be used? Why is this sample size larger than that found in part (a)? (10 pts.)
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