stats 260 final – Casselman Exam Questions and Answers

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 Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024 Copyright ©Stuvia International BV Page 2/3 T/F?? Simple linear regression consists of one and only one explanatory variable. - ANSWER-TRUE T/F?? for negative correlation, the Y-value would decrease as the X value increases. - ANSWER-TRUE T/F?? In Multiple Regression, the F- statistic is the Sum of Squared Regression (SSR) divided by the Sum of Squared Error (SSE). - ANSWER-FALSE T/F?? In Multiple Regression, the F- statistic is the MSR divid