Mathematics, 17.05.2021 20:40, Lena3055

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 1% 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 28% of the respondents said they eat fast food four to six times per week.

(a) What is the minimum sample size needed assuming that no prior information is available?

n=

(Round up to the nearest whole number as needed.)

(b) What is the minimum sample size needed using a prior study that found that 28% of the respondents said they eat fast food four to six times per week?

n=

(Round up to the nearest whole number as needed.)

Answers: 3

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A researcher wishes to estimate, with 95 % confidence, the population proportion of adults who ea...