Question

20. All of the following statements are true about correlation EXCEPT:* (A) Correlation is always between 1 and 1, inclusive. (B) Correlation does not change if we change the scales of the explanatory variable (e.g. inches to feet). (C) Correlation measures how strong the linear tendency is between the explanatory and the response variables. (D) A correlation close to 1 or -1 indicates that the explanatory variable causes the response variable to behave a certain way.

Answer 1

Increases the other decreases and vice 20) All the statemente about the correlato between the two are true except (d) A correlation as t1 Indicates a perfect positive linear relation Vanably both the variables move in the same direction il If one Increases the other also increases and vice versa A corelation of - Indicates a perfect negetive relation both the variables in opposite directions ie If one for ith Pr Versa 35) The total number of people = 196 6 40+24+32+16 =liz 18+30+16+20=86 196 Number of persons who are drinkers and Involved in a car accedent = 40+32 =72 If a person is selected olandomly the probability that he is a drinke, and Involved in a car accident 32 is giku as 30,3673 (C) 8.3673 0:3673 196 92 196