Question
In: Statistics and Probability
A non-profit agency wants to estimate the proportion of adults who answer yes to the question,...
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A non-profit agency wants to estimate the proportion of adults who answer yes to the question, ‘Was there ever a time in your life when you did not have a place to live?' They want to estimate the percentage at the 95% level with a margin of error of nor more than 0.5%.
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Find a sample size that will guarantee their confidence interval will have a margin of error of less than 0.5%.
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Why is the sample size you found in part likely to be far bigger than necessary?
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To get a better estimate of the sample size they will need, they take a preliminary sample of 30 adults, of which 2 answered yes to the question. About what sample size should they realistically expect to need?
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Solutions
Expert Solution
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2.
The sample size is so big because we are using the worst-case scenario proportion of 0.5.
3.
Let me know in the comments if anything is not clear. I will reply ASAP! Please do upvote if satisfied!
orchestra answered 1 year agoRelated Solutions
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