klbryant2001
17.05.2021 •
Mathematics
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.)
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Ответ:
2.) 4, 6, 8
3.) -15, -13, -11