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An instructor believes that the average quiz score is a good predictor

July 18, 2020/in Feeds /by admin

An 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 95 50 60 100 55 85 70 75 85
y 70 96 50 63 96 60 83 60 77 87
(a) Find an equation of the least squares regression line and show how. Round the slope and y-intercept value to two decimal places.
(b) Based on the equation from part (a), what is the predicted final exam score if the average quiz score is 65?
(c) Based on the equation from part (a), what is the predicted final exam score if the average quiz score is 40?
(d) Which predicted final exam score that you calculated for (b) and (c) do you think is closer to the true final exam score and why?