## Construct a 95% confidence interval for the mean of the population paired differences.

A company sent seven of its employees to attend a course in building self-confidence. These employees were evaluated for their self-confidence before and after attending this course. The following table gives the scores (on a scale of 1 to 15, 1 being the lowest and 15 being the highest score) of these employees before and after they attended the course.

Before |
8 |
5 |
4 |
9 |
6 |
9 |
5 |

After |
10 |
8 |
5 |
11 |
6 |
7 |
9 |

- Construct a 95% confidence interval for the mean of the population paired differences.
- Interpret the results.

in progress

Theory of probability
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