С D Exercise 15-41 Algo - nm + 2 3 A GPA 2.8 3.4 2.5 =1& B GRE 750 670 780 Estimate: GPA = Bp + B1GRE + E, where GRE is

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С D Exercise 15-41 Algo - nm + 2 3 A GPA 2.8 3.4 2.5 =1& B GRE 750 670 780 Estimate: GPA = Bp + B1GRE + E, where GRE is a student's score on the math portion of the Graduate Record Examination (GRE) score and GPA is the student's grade point average in graduate school. [You may find it useful to reference the t table.) 4 | | ح 5 680 picture Click here for the Excel Data File 6 720 7 8 3.4 2.8 3.7 2.4 2.6 a. Construct the 90% confidence interval for the expected GPA for an individual who scored 730 on the math portion of the GRE. (Round regression estimates to at least 4 decimal places, "ta/2, df" value to 3 decimal places, and final answers to 2 decimal places.) 770 750 760 000 10 3.8 680 740 11 | က Confidence interval to 12 2.7 2.7 3.1 680 13 3 14 15 640 710 710 700 2.6 16 3.2 00 OEM Cå ñ ña 17 b. Construct the 90% prediction interval for GPA for an individual who scored 730 on the math portion of the GRE. (Round regression estimates to at least 4 decimal places, "ta/2, df" value to 3 decimal places, and final answers to 2 decimal places.) 3.5 3.9 2.5 750 700 18 19 660 Prediction interval to 20 21 2.9 3.5 000 inoin 2.1 22 23 24 740 660 760 660 650 670 2.7 3.8 2.5 25