Answer Happy

A clinical trial was conducted to test the effectiveness of a
drug used for treating insomnia in older subjects. After treatment
with the​ drug, 16 subjects had a mean wake time of 94.2
min and a standard deviation of 41.5 min. Assume that the 16
sample values appear to be from a normally distributed population
and construct a 90​% confidence interval estimate of the standard
deviation of the wake times for a population with the drug
treatments. Does the result indicate whether the treatment
is​ effective?
Question content area bottom
Part 1
Find the confidence interval estimate.
enter your response here
min<σ<enter your response here
min
​(Round to two decimal places as​ needed.)
Part 2
Does the result indicate whether the treatment
is​ effective?
A.
​Yes, the confidence interval indicates that the treatment is
not effective because the interval does not contain 0 minutes.
B.​Yes, the confidence interval indicates that the treatment is
not effective because the interval does not contain
94.2
minutes.
C.
​No, the confidence interval does not indicate whether the
treatment is effective.
D.
​Yes, the confidence interval indicates that the treatment is
effective because the interval does not contain 0 minutes.
E.​Yes, the confidence interval indicates that the treatment is
effective because the interval does not contain
94.2
minutes.
F.
​Yes, the confidence interval indicates that the treatment is
not effective because the interval contains 0 minutes.
G.
​Yes, the confidence interval indicates that the treatment is
effective because the interval contains 0 minutes.