Use the given information to find the number of degrees offreedom, the critical values 2L and 2R, and the confidence interval estimate of . It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution.

White Blood Counts of Women 95% confidence; n=150, s=1.98 (1000 cells/L).

df=

(Type a wholenumber.)

2L=

(Round to two decimal places asneeded.)

2R=

(Round to two decimal places asneeded.)

The confidence interval estimate of is (1000 cells/L) << (1000 cells/L).

(Round to two decimal places asneeded.)