please help and be specific ?

' lanw\\'wt a 1. An industrial psychologist is concerned that a 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, Before After 4 7 5 3 6 8 9 9 7 3 8 8 6 2 I 5 6 7 5 6 3 a. What are the hypotheses? b. State your critical value(s) using o = .05. . Conduct the test. Be sure to include the following, if necessary test statistic, degrees of freedom, computations... d. What do you conclude? Interpret your results. e. What is the 95% confidence interval