ENGR 132 - QUIZ11

# ENGR 132 - QUIZ11 - square of correlation coefficient Show...

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Click to edit Master subtitle style 4/24/11 ENGR 132 Wed/Fri 3:30-5:30

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4/24/11 Quiz 11 1) What is SSE? 2) What is SST? 3) The coefficient of determination (square of correlation coefficient) can range in value from ____ to ____.
4/24/11 Solution 1) Sum of the Squares of Error: is a measure of how well our prediction matches the actual data 2) Sum of the Squares of Deviations: is a measure of how much variability there is in the y-values 3) __0__ to __1__. +3 – either the name or the definition +3 – either the name or the definition +2 for 0 +2 for 1

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Click to edit Master subtitle style 4/24/11 ENGR 132 Tues/Thurs 9:30-11:30
4/24/11 Quiz 11 For the plot shown on the right, compute the

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Unformatted text preview: square of correlation coefficient. Show your work! ∑ =-= n i i f y SSE 1 2 i )] (x [ ∑ =-= n i i y y SST 1 2 ] [ SST SSE r-= 1 2 1 2 3 4 1 2 3 4 Car Distance as a Function of Time Time (s) Distance (m) Line of Best Fit Experimental Data 4/24/11 Solution SSE= ( (0-0)2+(0-1)2+(4-2)2+(2-3)2) = 6 ybar = (0 + 4 + 2)/3 = 2 SST = (0-2)2+(4-2)2+(2-2)2) = 8 ∑ =-= n i i f y SSE 1 2 i )] (x [ +3 – correct formula- work - answer +2 – answer (may put this in SST directly) +3 – correct formula- work - answer +2 - answer ∑ =-= n i i ] y [y SST 1 2 n y y n i i ∑ = = 1 ] [ SST SSE r-= 1 2...
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ENGR 132 - QUIZ11 - square of correlation coefficient Show...

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