
Determining
34. Astrology A sociologist plans to conduct a survey to estimate the percentage of adults who believe in astrology. How many people must be surveyed if we want a confidence level of 99% and a margin of error of four percentage points?
a. Assume that nothing is known about the percentage to be estimated.
b. Use the information from a previous Harris survey in which 26% of respondents said that they believed in astrology.

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