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stats 260 final – Casselman Exam Questions and Answers

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stats 260 final – Casselman Exam Questions and Answers Y is also known as? - ANSWER-the responsible variable X is also known as? - ANSWER-the explanatory variable what are the 3 properties of the "least squares" regression? - ANSWER-1) always sums to 0 2) the "least squares" line produces sm...

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  • November 4, 2024
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stats 260 final – Casselman Exam

Questions and Answers


Y is also known as? - ANSWER✔✔-the responsible variable


X is also known as? - ANSWER✔✔-the explanatory variable


what are the 3 properties of the "least squares" regression? - ANSWER✔✔-1) always sums to 0


2) the "least squares" line produces smaller "sum of squared residuals" than any other straight line can


3) the line always passes through point (X bar, Y bar)


for the P value, if it's greater than .05, is it useful? - ANSWER✔✔-no


what does (Yi-Y ̂)^2 =??? - ANSWER✔✔-SSE


what does (Yi-Y ̅)^2=??? - ANSWER✔✔-SST


what does the F test do? - ANSWER✔✔-testing significance of entire regression


what does the T test do? - ANSWER✔✔-testing significance of one variable


SST=???? - ANSWER✔✔-SSE+SSR


F=???? - ANSWER✔✔-MSR/MSE


sample correlation coefficient forumla?? - ANSWER✔✔-(sign of b1)√r^2


r^2=???? - ANSWER✔✔-SSR/SST


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