Question: a clinical trial tests a method designed to increase the probability of conceiving a girl in the study 400 babies were born, and 340 of

a clinical trial tests a method designed to increase the probability of conceiving a girl in the study 400 babies were born, and 340 of them were girls. Use the sample data to construct a 99% confident interval estimate of the percentage of the girls born . Based on the results, does the method appear to be effective?

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does the method appear to be effective?

No the proportion of girls is not significantly different than .5

Yes the proportion of girls significantly different than .5

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