Use the given information to find the number of degrees of freedom, 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

80%

confidence;

n=146,

s=1.98

(1000

cells/L).

The confidence interval estimate of is

enter your response here

(1000 cells/L)<

(Round to two decimal places as needed.)