Module Three
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Answer to Module 3 Exercise 1
 

 
    If you then draw a line, so that the plotted points are on or as near to the line as possible, you have the regression line.
 
 
 
 
 
    This is a positive correlation, because as scores on one measure go up, so do scores on the other measure. You could also say that as scores on one measure go down, so do scores on the other measure. If the scores are moving in the same direction, the regression line will go from lower left to upper right, and it is a positive relationship. 
     

    This is also considered a strong relationship, because all points are on or very close to the line.  
     


 
Readings 
    Chapter 3  -- Linn R.L. & Gronlund, N.E. (1995). Measurement and assessment in teaching. Englewood Cliffs, NJ: Merrill. 
 
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