Mathematics, 24.04.2020 22:08 poliver
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 370 babies were born, and 333 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?
Answers: 2
, we assume normal distribution and calculate the 99% confidence interval as below:![CI=\hat p\pm z\sqrt{\frac{\hat p(1-\hat p)}{n}}\\\\=0.9\pm2.576\sqrt{\frac{0.9\times 0.1}{370}}\\\\=0.9\pm 0.0402\\\\={0.8598, \ 0.9402]](/tpl/images/0625/3747/4748b.png)
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A clinical trial tests a method designed to increase the probability of conceiving a girl. In the st...
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