spector(faraway) R Documentation 

Teaching methods in Economics
Description
A study to determine the effectiveness of a new teaching method in Economics 

Usage
data(spector)
Format
A data frame with 32 observations on the following 4 variables. 

grade
1 = exam grades improved, 0 = not improved 
psi
1 = student exposed to PSI (a new teach method), 0 = not exposed 
tuce
a measure of ability when entering the class 
gpa
grade point average 

> spector
   grade psi tuce  gpa
1      0   0   20 2.66
2      0   0   22 2.89
3      0   0   24 3.28
4      0   0   12 2.92
5      1   0   21 4.00
6      0   0   17 2.86
7      0   0   17 2.76
8      0   0   21 2.87
9      0   0   25 3.03
10     1   0   29 3.92
11     0   0   20 2.63
12     0   0   23 3.32
13     0   0   23 3.57
14     1   0   25 3.26
15     0   0   26 3.53
16     0   0   19 2.74
17     0   0   25 2.75
18     0   0   19 2.83
19     0   1   23 3.12
20     1   1   25 3.16
21     0   1   22 2.06
22     1   1   28 3.62
23     0   1   14 2.89
24     0   1   26 3.51
25     1   1   24 3.54
26     1   1   27 2.83
27     1   1   17 3.39
28     0   1   24 2.67
29     1   1   21 3.65
30     1   1   23 4.00
31     0   1   21 3.10
32     1   1   19 2.39