Question

Consider the estimated equation below, which can be used to study the effects of skipping class on college GPA: colGPA_hat = 1.39 + .412 hsGPA + .015 ACT - .083 skipped (.33) (.094) (.011) (.026) n=141, R2=.234 Using the standard normal approximation, find the 90% confidence interval for beta_hsGPA.

[.029, .736]

[.132, .693]

[.257, .567]

[.154, .493]

Answer 1

Solution: Given ColaPA = 1.39 +:412 hs Gen + 0.015ACT – 0,083 (133) (094) (0.011) (0.026) n=141 R? -,234 using Standard normal appoximation, the 9001. confidence interval for beta -he GPA is: [zat 90.1 = 1.64) → 90.1. confidence interval is ; · beta-hsgpa = befahat I 1:64 ( SE (beta-hat)) = 0.412 1.64 +0.09) = 0.412 0.15416 = 60.412 +0.15416, 0-412 -0.15416) = 60.56616, 0-25784) (09:1-457,0.567] option & is correct