Historically, the length of human pregnancies has been normally distributed, with a standard deviation of =8.8{"version":"1.1","math":"\sigma = 8.8"} days. A random sample of n=10{"version":"1.1","math":"n = 10"} women was collected. The sample mean duration of their pregnancies was x=279.1{"version":"1.1","math":"\bar{x} = 279.1"} days. Please use this information to calculate a 90% confidence interval for the true mean length of human pregnancies. Input the lower and upper bounds

Question 18 (0.5 points)

Input the lower bound.

Input the upper bound.