Construct a 99% confidence interval for the population standard deviation of white blood cell count (in cells per microliter). A
ssume 7 random samples were selected from a population that has a normal distribution. The sample has a mean of 7.106 cells and a standard deviation of 2.019 cells. 1.098 < σ < 4.973
4.042 < σ < 21.170
1.148 < σ < 6.015
1.319 < σ < 36.181