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(Solved): A study was conducted to detemine whether a the final grade of a student in an introductory psycho ...



A study was conducted to detemine whether a the final grade of a student in an introductory psychology course is linearly rel

A study was conducted to detemine whether a the final grade of a student in an introductory psychology course is linearly related to his or her performance on the verbal ability test administered before college entrance. The verbal scores and final grades for 10 students are shown in the table below. Find the least squares line. \[ \hat{y}=+\quad x \] Should the regression be used to predict the final grade of a student with a verbal score of 100 ? answer:


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X Y X2 XY 67 76 4489 5092 56 69 3136 3864 36 39 1296 1404 54 64 2916 3456 60 76 3600 4560 65 75 4225 4875 76 87 5776 6612
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