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a grocery store wants to examine the relationship between the sales amounts each day at two different locations, store a and store b. the sales amount each day, in dollars, was recorded for 10 days at each store. the least-squares regression line is yˆ



Answer :

The mean of the 10 sales amounts for store A is $40,000

The  least-squares regression line is

y=-3000+1.2x

where

x represents the sales amounts each day at store A

y represents the sales amounts each day at store B

we have

y=$45,000

substitute the value of y in the linear equation and solve for x

45000=-3000+1.2x

1.2x=48000

x=40000

therefore

The mean of the 10 sales amounts for store A is $40,000

Learn more about least-squares here:

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