Table 8: The means and standard deviations of the number of tests passed in each of the two courses, along with the correlation between the two courses. The first line gives the observed values corresponding to Table 1; the estimated predictive values associated with the first, second, and third models follow.

First course 
Second course 
Correlation 
Mean 
Std. Dev. 
Mean 
Std. Dev. 
Observed 
3.519 
0.699 
2.346 
0.947 
0.667 
First model 
3.545 
0.855 
2.370 
0.946 
0.412 
Second model 
3.551 
0.769 
2.371 
0.847 
0.284 
Third model 
3.533 
0.752 
2.355 
0.843 
0.246 