To estimate the average gestation time (time being carried in the womb between conception and birth) for humans, a researcher collected data from a sample of 20 babies and found that average gestation...

To estimate the average gestation time (time being carried in the womb between conception and birth) for humans, a researcher collected data from a sample of 20 babies and found that average gestation time in the sample is 245 days with a sample deviation of 10 days. Assume that the distribution of gestation time is Normal. What is a 96% confidence interval for μ?

A. 245 ± 4.58

B. 245 ± 4.93

C. 245 ± 4.71

D. 245 ± 3.91