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)
Another question on Mathematics
Mathematics, 21.06.2019 14:30
The amount of money, in dollars, in an account after t years is given by a = 1000(1.03)^t. the initial deposit into the account was $_^a0 and the interest rate was _a1% per year. only enter numbers in the boxes. do not include any commas or decimal points^t. the initial deposit into the account was $__^a0 and the interest rate is % per year.
Answers: 1
Mathematics, 22.06.2019 01:00
Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay
Answers: 2
Mathematics, 22.06.2019 02:00
Arectangular yard has area 96 square feet. if the width of the yard is 4 feet less than the length
Answers: 1
You know the right answer?
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the st...
Questions
English, 29.04.2021 18:20
Biology, 29.04.2021 18:20
Mathematics, 29.04.2021 18:20
Physics, 29.04.2021 18:20
Social Studies, 29.04.2021 18:20
English, 29.04.2021 18:20
Spanish, 29.04.2021 18:30
Mathematics, 29.04.2021 18:30
Business, 29.04.2021 18:30
Biology, 29.04.2021 18:30
Chemistry, 29.04.2021 18:30
English, 29.04.2021 18:30
Mathematics, 29.04.2021 18:30
Mathematics, 29.04.2021 18:30
Social Studies, 29.04.2021 18:30
Mathematics, 29.04.2021 18:30
