The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 17 days. In what range would you expect to find the middle 95% of most pregnancies?
Accepted Solution
A:
Answer:range is between 294.32 and 227.68 expect the middle 95% of most pregnancies Step-by-step explanation:Given data mean μ = 261 daysstandard deviation SD = 17 daysmost pregnancies = 95% to find out In what range expect to find the middle 95% of most pregnancies solution we have Z value for 95% is 1.96so Confidence interval = mean +/- 1.96×SDput vale Confidence interval = 261 +/- 1.96(17) Confidence interval = 294.32 and 227.68range is between 294.32 and 227.68 expect the middle 95% of most pregnancies