Wading Through the Data Swamp:
Program Evaluation 201

Supplements

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

Step 4: Sum the scores of the pretest for both groups.

This step is represented as Sum (result of adding)(scores) where Sum (result of adding) is the symbol for summation. The sum of the scores for participants is 82. The sum of the scores for the comparison group is 77.

Pretest Scores, Participants and Comparison Group

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

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