Question
(1) Any line that goes through the point of means makes the sum of residuals equal to 0. T or F (2) A strong relationship
(1) Any line that goes through the point of means makes the sum of residuals equal to 0. T or F
(2) A strong relationship between two variables always means those changes in one variable cause changes in the other. T or F
(3) Correlation is not resistant and strongly affected by a few outlying observations. T or F
(4) A correlation is always between 0 and 1. T or F
(5) Both correlation and regression require explanatory and response variables T or F
(6) Correlation can measure the direction and strength of nonlinear association T or F
(7) Every least-squares regression line passes through ( x , y ) T or F
(8)In least square regression, a residual is the vertical distance or deviation from the observation to the regression line. T or F
(9) Correlation is easily affected by linear transforming of x or y. T or F
(10) Area under the density curve sum up to 1. T or F
Rank the following in order, from highest to lowest, by the correlations you would estimate there to be between:
A Purchase price of a home and the yearly income of the purchasing family
B Purchase price of a home and the shoe size of the purchaser
C Purchase price of a home and age of the buyer Write the letters in order from highest to lowest.
(Highest) ___ ____ ____ (Lowest)
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