By NEAS - 7/2/2024 1:14:15 PM
MS Module 19 Correlation basic practice exam questions
(The attached PDF file has better formatting.)
[The practice problems in the 24 modules explain the statistical procedures; the practice exam questions in this thread shows what you will be asked on the final exam.]
Question 19.1: t value for correlation
A regression model Yj = β0 + β1 Xj + εj has N = 12 observations. The sample correlation between X and Y is 0.49. We test the null hypothesis H0: ρ = 0.
What is the t value to test the null hypothesis?
Answer 19.1: 0.49 × (12 – 2)0.5 / (1 – 0.492)0.5 = 1.778
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