Statistics - Hypothesis Testing Projects

Compute the mean, median mode, standard deviation, variance, and range for the following data. Provide

Compute the mean, median mode, standard deviation, variance, and range for the following data. Provide these statistics and answer these questions: Which test had the highest average score? Which test had the smallest amount of variability?

Test 1	Test 2	Test 3
49	50	50
47	49	50
51	51	49
55	46	49
55	48	48
45	53	49
47	49	46
45	52	51
46	48	48
53	55	50

2. Enter the following data into SPSS. Determine the correlation between hours of studying and grade point average in these honor students. Explain your results.

Hours of Studying	GPA
25	3.94
14	3.89
17	4.00
16	3.77
18	3.96
23	3.85
16	3.65
13	3.93
20	3.81
11	3.81

For this exercise you will be using the data contained in the following file (you can find it under Resources) NES2004.sav , Your assignment is to run at least 2 crosstabs , copy and paste them to this document and briefly explain each of them .

4. Researchers are interested in whether depressed people undergoing group therapy will perform a different number of activities of daily living before and after group therapy. The researchers have randomly selected 8 depressed clients in a 6-week group therapy program.

Use the five steps of hypothesis testing to determine whether the observed differences in numbers of activities of daily living (shown below) obtained before and after therapy are statistically significant at the .05 level of significance and, for practice, at the .01 level. (Clearly indicate each step).

In Step 2, show all calculations. As part of Step 5, indicate whether the researchers should recommend group therapy for all depressed people based on evaluation of the null hypothesis at both levels of significance and calculate the effect size.

CLIENT	BEFORE THERAPY	AFTER THERAPY
A	11	17
B	14	15
C	8	12
D	9	21
E	13	16
F	10	18
G	7	17
H	12	8

5. The scores on a job satisfaction inventory for both groups are listed in the table below. Use the five steps of hypothesis testing to determine whether the job satisfaction scores of the group that participated in counseling are statistically higher than the scores of employees who did not participate in counseling at the .01 level of significance. In Step 2, show all calculations. As part of Step 5, indicate whether the researcher should recommend counseling as a method to improve job satisfaction following industrial accidents based on evaluation of the null hypothesis and calculate the effect size.