Concept explainers
a.
Find the linear prediction rule for predicting test grade from hours studied.
b.
Draw a regression line by using SPSS.
c.
Use linear prediction rule from Part (a) to predict the test grade score for a student based on study hours score.
d.
Use linear prediction rule from Part (a) to predict the test grade score for a student based on study hours score.
e.
Use linear prediction rule from Part (a) to predict the test grade score for a student based on study hours score.
f.
Determine the standardized regression coefficient.
g.
Explain all the previous parts of this question to someone who understands the mean and deviation scores but does not know any more about statistics.
h.
Add the dots for the pairs of scores for the five students to your figure from part (b).
Also add a regression line for the linear prediction rule
i.
Explain which regression line does a better job of coming close to the dots in your figure for Part (h).
j.
Find the sum of squared errors for the linear prediction rule from part (a) and for the prediction rule
k.
Find the proportionate reduction in error.
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Statistics for Psychology
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