Weights of pounds. A researcher wishes to estimate the mean weight of all women in this age groups. Find how large a sample must be drawn in order to be 90% confident that the sample mean will not differ from the population mean by more than 3.5 pounds. As a suggestion, use z to 3 decimal places. O 70 O 69 O91 O55

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Weights of women of a certain age group are normally distributed with a standard deviation of 17.7
pounds. A researcher wishes to estimate the mean weight of all women in this age groups. Find how
large a sample must be drawn in order to be 90% confident that the sample mean will not differ from the
population mean by more than 3.5 pounds. As a suggestion, use z to 3 decimal places.
O70
O 69
91
O 55
Transcribed Image Text:Weights of women of a certain age group are normally distributed with a standard deviation of 17.7 pounds. A researcher wishes to estimate the mean weight of all women in this age groups. Find how large a sample must be drawn in order to be 90% confident that the sample mean will not differ from the population mean by more than 3.5 pounds. As a suggestion, use z to 3 decimal places. O70 O 69 91 O 55
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