I am having trouble with this question.  It is due today. Mr....

I am having trouble with this question.  It is due today.

Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the
number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the
following sample information. The X column indicates the number of client contacts last month, and the Y column
shows the value of sales ($ thousands) last month for each client sampled.
Number of
Contacts,
X
Sales
($ thousands),
Y
Number of
Contacts,
X
Sales
($ thousands),
Y
14 24 23 30
12 14 48 90
20 28 50 85
16 30 55 120
46 80 50 110
Click here for the Excel Data File
a. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Do not round
intermediate calculations. Round final answers to 2 decimal places.)
X Y
( )
2
( ) 2 ( )(
14 376.36 1376.41 719.
12 14 −21.4 −47.1
20 −13.4 179.56 443.
16 30 −31.1 967.21
46 12.6 357.21
23 −10.4 967.21
48 90 28.9 213.16 421.
50 85 23.9 275.56 396.
55 466.56 3469.21 1,272.
50 110.0 16.6 48.9
= = s
x
=