Question

23. A study of high school students in two states showed that those who worked only a few hours per week has highest grade-point averages (GPAs). The following shows GPAs and work hours per week for a sample of five students. Grade-Point Average, y Hours Worked per week, x -294.0; S,--4.55; Syー0.08968; 2.93 3.00 2.86 3.04 2.66 21 12 17 x=11.0; and y-2.898. (a) Obtain the least squares line to the data. (b) Interpret the coefficients in (a). (c) Predict the GPA of a student who works 25 hours per week d) Would you be comfortable with the prediction in (c)? Why or why not? (e) Calculate r and r and interpret their values.

Answer 1

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