1. A research study was conducted to examine the differences between older and younger adults on perceived life satisfaction. A pilot study was conducted to examine this hypothesis. Ten older adults (over the age of 70) and ten younger adults (between 20 and 30) were give a life satisfaction test (known to have high reliability and validity). Scores on the measure range from 0 to 60 with high scores indicative of high life satisfaction, low scores indicative of low life satisfaction. The data are presented below. Compute the appropriate t-test.

Older Adults	Younger Adults
45	34
38	22
52	15
48	27
25	37
39	41
51	24
46	19
55	26
46	36

1. What is your t value?
2. What would be the null hypothesis in this study?
3. What would be the alternate hypothesis?
4. What are your degrees of freedom?
5. Is there a significant difference between the two groups?
6. Interpret your answer in APA

2- Researchers want to examine the effect of perceived control on health complaints of geriatric patients in a long-term care facility. Thirty patients are randomly selected to participate in the study. Half are given a plant to care for and half are given a plant, but the care is conducted by the staff. Number of health complaints are recorded for each patient over the following seven days. Compute the appropriate t-test for the data provided below.

Control over Plant	No Control over Plant
23	35
12	21
6	26
15	24
18	17
5	23
21	37
18	22
34	16
10	38
23	23
14	41
19	27
23	24
8	32

1. What is your t value?
2. What would be the null hypothesis in this study?
3. What would be the alternate hypothesis?
4. What are your degrees of freedom?
5. Is there a significant difference between the two groups?
6. Interpret this answer in APA

3- An investigator predicts that individuals that fit the "Type A" Behavior Pattern (highly competitive and time conscious) will have higher scores on a questionnaire measure of need for achievement that individuals that fit the "Type B" Behavior pattern (absence of Type qualities). The investigator collects need for achievement scores from 10 Type A subjects and 10 Type B subjects. Higher scores reflect greater levels of need for achievement. Write the null and alternative hypotheses for testing this prediction. Please provide the results in APA that states the conclusion the investigator is entitled to draw.

T A T B

--------- ---------

12 8

10 10

8 5

11 7

15 8

12 5

9 4

16 7

11 8

8 10

4- An investigator conducts a study to examine the benefits of psychotherapy for individuals with depression. Specifically, the investigator predicts that depressed individuals who receive psychotherapy in addition to drug therapy for depression will display significantly lower levels of depression than persons with a diagnosis of depression who receive only drug therapy. The investigator assigns 10 subjects to each of the two conditions stated above. After three months the investigator measures depression using a scale in which higher scores reflect higher levels of depression. Write the null and alternative hypotheses for testing the investigator's prediction.Please provide the results in APA that states the conclusion the investigator is entitled to draw.

Psychotherapy plus drug therapy group: 23, 19, 16, 18, 15, 22, 16, 18, 19, 20

Drug therapy only: 24, 27, 26, 28, 29, 24, 26, 25, 22, 28

5- In this study, 12 participants were given as much time as they needed to memorize a poem. When they thought they had memorized the poem, the participants recited it, and the number of errors they made was counted.

Calculate the correlation between the amount of time participants worked on memorizing the poem and the number of errors they made using SPSS. Copy and paste the tables and answer in APA report the results

Time(min) 6 11 10 5 3 12 9 4 4 1 7 9	Errors 3 0 5 2 1 6 0 9 5 7 4 1