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If no estimate of the sample proportion is available how

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Reference no: EM13580146

Question: A recent study indicated that 29% of 100 women over age 55 in the study were widows.

a) How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion?

b) If no estimate of the sample proportion is available, how large a sample is needed?

Reference no: EM13580146

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