SOLUTION: A social service worker wants to estimate the true proportion of pregnant teenagers who miss at least one day of school per week on average. The social worker wants to be within

Algebra.Com
Question 714903: A social service worker wants to estimate the true proportion of
pregnant teenagers who miss at least one day of school per week on
average. The social worker wants to be within 5% of the true
proportion when using a 90% confidence interval. A previous study
estimated the population proportion at 0.21.
(a) Using this previous study as an estimate for p, what sample size
should be used?
(b) If the previous study was not available, what estimate for p
should be used

Answer by lynnlo(4176)   (Show Source): You can put this solution on YOUR website!

RELATED QUESTIONS

1.In a survey of 150 randomly selected teenagers, 75 stated that they drank alcoholic... (answered by AlgebraLady88)
Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose... (answered by ewatrrr)
A music industry researcher wants to estimate, with a 90% confidence level, the... (answered by Boreal)
A music industry researcher wants to estimate, with a 90% confidence level, the... (answered by stanbon)
A music industry researcher wants to estimate, with a 95% confidence level, the... (answered by Boreal)
A study found that 73% of elementary students buy lunch at school at least once a month.... (answered by Boreal)
In a survey, 376 out of 1,078 US adults said they drink at least 4 cups of coffee a day.... (answered by Boreal)
. An investigator wants to estimate caffeine consumption in high school students. How... (answered by reviewermath)
A researcher wishes to estimate the proportion of college students who own a car. He... (answered by math_tutor2020)