Solve for the predicted values of y and the residuals for the following data. Advertising 12.5 3.7 21.6 60.0 37.6 6.1 16.8 41.2
Sales 148 55 338 994 541 89 126 379

Step-by-step explanation:

Given the data:

Predicted value (X):

12.5

3.7

21.6

60.0

37.6

6.1

16.8

41.2

Sales (Y) :

148

55

338

994

541

89

126

379

Using a linear regression calculator to obtain the linear model for the predicted y values

Ypred = 15.23977X - 46.29181

_Y Ypred ___residual(Y - Ypred)

148 ___ 144.21 3.79

55 10.05 44.5

338 ___282.89 55.11

994 ___868.09 125.91

541 526.72 14.28

89 46.67 42.33

126 209.74 −83.74

379581.59 - 202.59

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads