STATS Problem

7. —Show Work —

Below are data showing the results of six subjects on a memory test. The three scores per subject are their scores on three trials (a, b, and c) of a memory task. Are the subjects get- ting better each trial? Test the linear effect of trial for the data.

 

 a    b    c

 

4     6    7

 

3     7    8

 

2     8    5

 

1     4    7

 

4     6    9

 

2     4    2

 

A. Compute L for each subject using the contrast weights -1, 0, and 1. That is, compute (-1)(a) + (0)(b) + (1)(c) for each subject.

 

B. Compute a one-sample t-test on this column (with the L values for each subject) you created.