A researcher wishes to estimate, with 95% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 4% of the population...

A researcher wishes to estimate, with

95%

confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within

of the population proportion.

(a) No preliminary estimate is available. Find the minimum sample size needed.

(b) Find the minimum sample size needed, using a prior study that found that

46%

of the respondents said they eat fast food four to six times per week.

Jun 08, 2022

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