MATH302 WEEK 7 TEST

MATH302 WEEK 7 TEST Part 1 of 7 - Linear Regression and Correlation; Outliers and Values of Correlation 2.0/ 2.0 Points Question 1 of 20 1.0/ 1.0 Points The least squares regression line for a data set is yˆ=5+0.3x and the standard deviation of the residuals is 0.52. Does a case with the values x = -1.59, y = 5.78 qualify as an outlier?  A. Cannot be determined with the given information  B. No  C. Yes Answer Key: C Feedback: Plug in -1.59 for x. y = 5 + .3*-1.59 y = 4.523 Residual is y-given - y-predicted. 5.78 - 4.523 = 1.257 - this is the residual value. To see if it is an outlier take 2 and multiply it by .52 2*.52 = 1.04 1.257 is greater than 1.04, Yes it is an outlier. Question 2 of 20 1.0/ 1.0 Points A vacation resort rents SCUBA equipment to certified divers. The resort charges an up-front fee of $25 and ano