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 neccesary? A previous study found that 15% of the 125 people surveyed said they did not eat lunch.

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Asked Oct 27, 2019
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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 neccesary? A previous study found that 15% of the 125 people surveyed said they did not eat lunch.

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Expert Answer

Step 1

It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Step 2

Here,

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a 1-0.95 =0.05 0.05 2 2 =0.025 F0.025 2 1.96 (Using standard normal table)

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