Question1 . Calculate the slope and intercept of the least squaresregression lin
ID: 2955282 • Letter: Q
Question
Question1. Calculate the slope and intercept of the least squaresregression line where the x-variable is pre-exam totalscore and the y-variable is final exam score.
1 slope (use 4 decimal places in youranswer)
2 intercept (use 4 decimal placesin your answer)
Question2. What is the value of Julie's final exam score predictedby the least squares regression line?
3(use 4 decimal places in youranswer)
Question3. Julie complains to Professor Friedman that her finalexam score could have been much higher than what is predicted bythe least squares regression line. Calculate the proportion of thevariation in final exam scores that is explained by the linearrelationship between pre-exam scores and final exam scores.(Express your answer as a decimal, not as a percent).
4 (use 3 decimal places in youranswer)
Explanation / Answer
r2 is the proportion of Y that isexplained by the regression model.r2 = (0.51)2 = 0.2601 = 0.260 Hope this helps, Mike
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