SOLUTION: The following data consists of test scores and hours of preparation for 5 randomly selected students in a class. For example, the student who spent 6 hours preparing for the test

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Question 349111: The following data consists of test scores and hours of preparation for 5 randomly selected students in a class. For example, the student who spent 6 hours preparing for the test had a score of 73.
Hours of Preparation 5 2 9 6 10
Test Score 64 48 72 73 82


a. Find the equation of the regression line for this data. Round values to three decimal places.



b. Find the best predicted test score for a student who spent 4 hours preparing for the test. Round to the nearest whole number

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a)xave=6.4
yave=67.8
SSXX=41.20
SSYY=652.8
SSXY=152.40
b1=SSXY%2FSSXX=3.699
b2=SSXY%2FSSYY=0.233
r%5E2=b1%2Ab2=0.864
a=yave-xave%2Ab1=44.126
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y=b1%2Ax%2Ba
highlight%28y=3.699x%2B44.126%29
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b) y=3.699x%2B44.126
y=3.699%284%29%2B44.126
y=14.796%2B44.126
y=58.922
highlight%28y=59%29