Question

1. Does sustained sensory deprivation have any effect on the alpha-wave patterns produced by the brain? To determine this, 10 subjects (inmates in a Canadian prison) were placed in solitary confinement for a week. At the end of the week, alpha-wave frequencies were measured for all subjects and compared to their values before confinement. Assume the population alpha-wave patterns are normally distributed and the inmates were randomly selected. Use a t-critical of 2.262.

Pre-confinement (Hz)	Confined (Hz)
10.4	9.6
10.3	10
10.8	10.3
10.5	9.9
11	10.5
10.6	9.2
10.4	9
9.7	9.8
11.2	9.8
12.2	9.1

                                        

1. What are the null and the alternative hypotheses? (.5 pts)
2. Calculate the appropriate test statistic including the formula that you used. (2 pts).
3. State your conclusion. (2 pts)
4. Calculate and interpret the 95% confidence interval for this test. (2 pts)
5. Discuss one potential ethical issue with the design of this study. (1 pt)

Answer 1