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Help me solve this please. One of the few on my hw list that I had no idea how to solve

A medical researcher is interested in the prenatal care received by pregnant women in inner cities. She interviews 35 randomly selected women with children on the streets of Baltimore and finds that the average number of gynecological checkups per pregnancy was 3, with a standard deviation of 1. Using a 9% level of confidence, estimate the population mean number of gynecological visits per pregnancy.

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I meant to put 95% confidence level. Not 9%
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