1. An industrial psychologist is concerned that recent round of layoffs at a plant might have affected the stress felt by employees who retained their positions. To measure whether the employees experienced a change in stress, the psychologist administered a stress measure to a sample of employees before and after the layoffs occurred. Below are the data from the psychologist's study; higher numbers correspond to higher stress levels.
   1. What are the hypotheses?

Before	After
4	6
3	5
7	6
5	7
2	4
6	6
5	7
5	6
8	8
6	3

1. State your critical value(s) using = .05.

1. Conduct the test. Be sure to include the following, if necessary - test statistic, degrees of freedom, computations...

1. What do you conclude? Interpret your results.

1. What is the 95% confidence interval?