For the following bookstore sales data, the correlation is 0.965. Number of Salespeople Working Sales (in $1000) 2................................................................................................10 3................................................................................................11 7................................................................................................13 9................................................................................................14 10..............................................................................................18 10..............................................................................................20 12..............................................................................................20 15..............................................................................................22 16..............................................................................................22 20..............................................................................................26 x = 10.4............................................................................ŷ = 17.6 SD(x) = 5.64...............................................................SD(y) = 5.34 i) If 18 people are working, what sales do you predict? j) If sales are actually $25000, what is the value of the residual? k) Have we overestimated or underestimated the sales?
For the following bookstore sales data, the
Number of Salespeople Working Sales (in $1000)
2................................................................................................10
3................................................................................................11
7................................................................................................13
9................................................................................................14
10..............................................................................................18
10..............................................................................................20
12..............................................................................................20
15..............................................................................................22
16..............................................................................................22
20..............................................................................................26
x = 10.4............................................................................ŷ = 17.6
SD(x) = 5.64...............................................................SD(y) = 5.34
i) If 18 people are working, what sales do you predict?
j) If sales are actually $25000, what is the value of the residual?
k) Have we overestimated or underestimated the sales?
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