Researchers studied whether corporate political contributions (number of candida

Question

Researchers studied whether corporate political contributions (number of candidates supported) predicted profits. From archival data, they determined how many political candidates each company supported with financial contributions, as well as each company’s profit in terms of a percentage. The accompanying table shows data for five companies. This sample has the following summary statistics:

Mx= 46.4, My=13.42, SDx= 37.77, SDy= 0.75, r = 0.90

Number of Candidates Supported

Annual Profit (%)

7

12.34

20

13.29

39

13.23

64

14.07

102

14.19

The summary figures have been rounded to two significant digits so please use the rounded figure for the following calculations. Do NOT recalculate the summary statistics! Also, multi-steps calculations are required to get to the correct answer, so do NOTround the intermediate calculations beyond 3 decimal places!

Calculate the intercept for the regression equation (round your final answer to TWO decimal places).

Calculate the slope for the regression equation (round your final answer to TWO decimal places).

Number of Candidates Supported

Annual Profit (%)

7

12.34

20

13.29

39

13.23

64

14.07

102

14.19

Explanation / Answer

XY and X2 as it was done in the table below.

the sum of every column:

X=232 , Y=67.12 , XY=3216.01 , X2=16470

A) INTERCEPT = 0.018

B)slove = a={YX2XXY}/{nX2(X)2} = 12.59

X Y XY XX 7 12.34 86.38 49 20 13.29 265.8 400 39 13.23 515.97 1521 64 14.07 900.48 4096 102 14.19 1447.38 10404

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