Use the given information to find the number of degrees of f

Use the given information to find the number of degrees of freedom, t 22L and 22R, 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. Platelet Counts of Women 99% confidence; n=21, s=65.9

df=

22L=

22R=

The confidence interval estimate of is=

Solution

df=21-2=19

22L=(-30.0983)

22R=(30.0983)

The confidence interval estimate of is=(-30.0983,+30.0983).