Mathematics, 13.06.2020 17:57 zhjzjzzj6325
Skipping Lunch A nutritionist wishes to determine, within 3%, the true proportion of adults who do not eat any lunch. If he wishes to be 95% confident that his estimate contains the population proportion, how large a sample will be necessary? A previous study found that 15% of the 125 people surveyed said they did not eat lunch.
Answers: 2
, and a confidence level of 
, we have the following confidence interval of proportions.
.
, z is the value of Z that has a pvalue of 
, so 
. 
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Skipping Lunch A nutritionist wishes to determine, within 3%, the true proportion of adults who do n...
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