Question: W ith the data in the accom panying table, estim ate GPA = 0 + 1 GRE + , w here GRE is a

W ith the data in the accom panying table, estim ate GPA = β0 + β1 GRE + ε , w here GRE is a student's score on the m ath portion o f the Graduate Record Exam ination score and GPA is the student's grade p o in t average in graduate school.

700 720 650 750 680 730 740 780 3.0 3.5 3.2 3.7 3.1 3.9 3.3 3.5

a. Construct a 90% confidence interval for the expected GPA for an individual who scored 710 on the math portion of the GRE.

b. Construct a 90% prediction interval for the GPA for an individual who scored 710 on the math portion of the GRE.

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