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ozill
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Hey everyone! Exam practice, that time of year. In this problem 13 with correct answer C, I'm not sure how they get the test statistic: http://i.imgur.com/doar3.jpgI think they want you to use a F-test, that tests the entire model, which is calculated by: F= ((R^2)/ K)/ ((1 - R^2)/(n-K-1)) where K is the number of independent variables (3 in this question)
Then the R square is the percentage of the model that is explained, so the explained variation in Y / total variation in Y
R^2 = SSR / (SSE+SSR)
SSR= sum of squared regression, SSE=sum of squared errors
Thanks for any help or insight!
Many thanks
Then the R square is the percentage of the model that is explained, so the explained variation in Y / total variation in Y
R^2 = SSR / (SSE+SSR)
SSR= sum of squared regression, SSE=sum of squared errors
Thanks for any help or insight!
Many thanks