QUESTION 1: Use the given information to find the number of degrees of freedom, the critical values

2Land 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.

Nicotine in menthol cigarette 95% confidence;

n=26,

s=0 mg.

df=?

(Type a whole number.)

2L=enter your response here

(Round to three decimal places as needed.)

X2r=?

(Round to three decimal places as needed.)

the confidence interval estimate of = ?

Question 2:

A simple random sample from a population with a normal distribution of 102 body temperatures has x=98.50F

and s=0.66F.

Construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans.

F<

(Round to two decimal places as needed.)