Answer Happy

A study was conducted to measure the effectiveness of hypnotism
in reducing pain. The measurements are centimeters on a pain scale
before and after hypnosis. Assume that the paired sample data are
simple random samples and that the differences have a distribution
that is approximately normal. Construct a​ 95% confidence
interval for the mean of the
​"before−​after"
differences. Does hypnotism appear to be effective in
reducing​ pain?
Before
11.1
6.3
6.8
7.9
12.1
7.2
4.5
0.6
After
6.4
2.2
7.7
8.1
8.7
6.5
3.7
2.5
Construct a​ 95% confidence interval for the mean of
the ​"before−​after" differences.
[ ] <μd< [ ]
​(Round to two decimal places as​ needed.)
Part 2
Does hypnotism appear to be effective in
reducing​ pain?
A. No​, because the confidence
interval does not include and is entirely greater than zero.
B. Yes​, because the confidence
interval includes zero.
C. No​, because the confidence
interval includes zero.
D. Yes​, because the confidence
interval does not include and is entirely greater than
zero.