Suppose a business records price and sales of an item each week and obtains the following information

mean of X: $20 Standard deviation of X : $2

Mean of Y: 20,000 , Standard deviation of Y: 1000

Correlation r= -0.8

Calculate the values A,B,C and D (1 mark)

Future value of X	Z score of X	Predicted y =average of y+ r*(Z score of X)* standard deviation of y
$18	A	B
$20	0	20,000
$24	C	D

You will get marks for each correct answer but note you are encouraged to show working. If the working is correct but the answer is wrong you will be given partial marks