SOLUTION: A STAT 200 instructor believes that the average quiz score is a good predictor of final exam score. A random sample of 10 students produced the following data where x is the avera

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Question 1058876: A STAT 200 instructor believes that the average quiz score is a good predictor of final exam
score. A random sample of 10 students produced the following data where x is the average quiz
score and y is the final exam score.
x 80 50 60 100 70 85 40 65 75 80
y 72 75 65 90 60 85 50 60 75 90
(a) Find an equation of the least squares regression line. Show all work; writing the correct
equation, without supporting work, will receive no credit.
(b) Based on the equation from part (a), what is the predicted final exam score if the average quiz
score is 90? Show all work and justify your answer.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Using EXCEL,
y=0.5984x%2B30.014
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..
.
.
.
.
y=0.5984%2890%29%2B30.014
y=53.856%2B30.014
y=83.87
or rounding up,
y=84