Pathways Courses - Wading Through the Data Swamp:

Wading Through the Data Swamp:
Program Evaluation 201

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The t-Test of Differences Between Means:
Independent Samples t-Test for Posttest Data

Step 4: Sum the scores at posttest for both groups.

This step is represented as Sum (result of adding) (scores) where is the symbol for summation. The sum of the participants' scores is 116. The sum of the comparison group scores is 175.

Posttest Scores, Inhalant Use

Picture of a scroll Scrolling Table! You can use the table below to scroll through the data.

Participant Group		Comparison Group
Kid #	Posttest Score(x)	Kid #	Posttest Score(x)

1	4	1	3
2	2	2	0
3	1	3	5
4	0	4	2
5	1	5	0
6	5	6	4
7	1	7	3
8	4	8	2
9	2	9	0
10	2	10	2
11	3	11	8
12	0	12	2
13	3	13	0
14	5	14	2
15	0	15	2
16	4	16	12
17	3	17	1
18	0	18	4
19	6	19	6
20	0	20	0
21	2	21	5
22	4	22	0
23	0	23	4
24	10	24	8
25	0	25	2
26	3	26	0
27	0	27	5
28	4	28	0
29	1	29	5
30	3	30	0
31	0	31	10
32	2	32	2
33	0	33	12
34	4	34	0
35	0	35	7
36	0	36	12
37	5	37	3
38	0	38	3
39	7	39	5
40	3	40	1
41	0	41	2
42	9	42	2
43	0	43	3
44	2	44	7
45	0	45	5
46	1	46	2
47	2	47	0
48	3	48	5
49	0	49	7
50	5	50	0

1	4	1	3
2	2	2	0
3	1	3	5
4	0	4	2
5	1	5	0
6	5	6	4
7	1	7	3
8	4	8	2
9	2	9	0
10	2	10	2
11	3	11	8
12	0	12	2
13	3	13	0
14	5	14	2
15	0	15	2
16	4	16	12
17	3	17	1
18	0	18	4
19	6	19	6
20	0	20	0
21	2	21	5
22	4	22	0
23	0	23	4
24	10	24	8
25	0	25	2
26	3	26	0
27	0	27	5
28	4	28	0
29	1	29	5
30	3	30	0
31	0	31	10
32	2	32	2
33	0	33	12
34	4	34	0
35	0	35	7
36	0	36	12
37	5	37	3
38	0	38	3
39	7	39	5
40	3	40	1
41	0	41	2
42	9	42	2
43	0	43	3
44	2	44	7
45	0	45	5
46	1	46	2
47	2	47	0
48	3	48	5
49	0	49	7
50	5	50	0

1	4	1	3
2	2	2	0
3	1	3	5
4	0	4	2
5	1	5	0
6	5	6	4
7	1	7	3
8	4	8	2
9	2	9	0
10	2	10	2
11	3	11	8
12	0	12	2
13	3	13	0
14	5	14	2
15	0	15	2
16	4	16	12
17	3	17	1
18	0	18	4
19	6	19	6
20	0	20	0
21	2	21	5
22	4	22	0
23	0	23	4
24	10	24	8
25	0	25	2
26	3	26	0
27	0	27	5
28	4	28	0
29	1	29	5
30	3	30	0
31	0	31	10
32	2	32	2
33	0	33	12
34	4	34	0
35	0	35	7
36	0	36	12
37	5	37	3
38	0	38	3
39	7	39	5
40	3	40	1
41	0	41	2
42	9	42	2
43	0	43	3
44	2	44	7
45	0	45	5
46	1	46	2
47	2	47	0
48	3	48	5
49	0	49	7
50	5	50	0

Wading Through the Data Swamp: Program Evaluation 201

The t-Test of Differences Between Means: Independent Samples t-Test for Posttest Data

Step 4: Sum the scores at posttest for both groups.

Posttest Scores, Inhalant Use

Wading Through the Data Swamp:
Program Evaluation 201

The t-Test of Differences Between Means:
Independent Samples t-Test for Posttest Data

1	4	1	3
2	2	2	0
3	1	3	5
4	0	4	2
5	1	5	0
6	5	6	4
7	1	7	3
8	4	8	2
9	2	9	0
10	2	10	2
11	3	11	8
12	0	12	2
13	3	13	0
14	5	14	2
15	0	15	2
16	4	16	12
17	3	17	1
18	0	18	4
19	6	19	6
20	0	20	0
21	2	21	5
22	4	22	0
23	0	23	4
24	10	24	8
25	0	25	2
26	3	26	0
27	0	27	5
28	4	28	0
29	1	29	5
30	3	30	0
31	0	31	10
32	2	32	2
33	0	33	12
34	4	34	0
35	0	35	7
36	0	36	12
37	5	37	3
38	0	38	3
39	7	39	5
40	3	40	1
41	0	41	2
42	9	42	2
43	0	43	3
44	2	44	7
45	0	45	5
46	1	46	2
47	2	47	0
48	3	48	5
49	0	49	7
50	5	50	0