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1.In regression, an influential point is defined as: Select one: a. An outlier because it is far away from the other data points b. A

1.In regression, an influential point is defined as:

Select one:

a.

An outlier because it is far away from the other data points

b.

A pair of data that dramatically change the slope of a regression line

c.All of these statements are true

d.

An extreme data point, but usually not a cause for concern

2.After using Excel to find the regression model for "Website Visits", how much do you expect a customer to spend after they visit your website for 10 minutes and view 5 pages?

Select one:

a.

$58.85

b.$99.21

c.$106.70

d.$66.34

3.In regression, a residual is:

Select one:

a.

The difference between an observed value of x and the predicted value of y

b.The difference between an observed value of y and the predicted value of y

c.

The difference between an observed value of y and the predicted value of x

d.

The difference between an observed value of x and the predicted value of y

WEBSITE VISITS DATA

Customer Day Browser Time (min) Pages Viewed Amount Spent ($)
1 Mon Internet Explorer 12.0 4 54.52
2 Wed Other 19.5 6 94.90
3 Mon Internet Explorer 8.5 4 26.68
4 Tue Firefox 11.4 2 44.73
5 Wed Internet Explorer 11.3 4 66.27
6 Sat Firefox 10.5 6 67.80
7 Sun Internet Explorer 11.4 2 36.04
8 Fri Firefox 4.3 6 55.96
9 Wed Firefox 12.7 3 70.94
10 Tue Internet Explorer 24.7 7 68.73
11 Sat Other 13.3 6 54.04
12 Sun Firefox 14.3 5 48.05
13 Sun Other 11.7 7 64.16
14 Mon Firefox 24.4 10 158.51
15 Fri Internet Explorer 8.4 3 84.12
16 Thu Internet Explorer 9.6 4 59.20
17 Thu Internet Explorer 23.3 7 91.62
18 Mon Internet Explorer 14.0 7 126.40
19 Fri Other 5.6 4 68.45
20 Wed Internet Explorer 15.1 5 32.69
21 Sat Firefox 16.3 5 78.58
22 Tue Internet Explorer 10.2 6 74.43
23 Sun Internet Explorer 8.0 3 32.73
24 Tue Firefox 8.0 2 48.66
25 Fri Firefox 9.6 3 54.66
26 Wed Internet Explorer 11.0 2 40.54
27 Sat Internet Explorer 16.9 5 34.69
28 Sat Firefox 6.0 4 27.91
29 Fri Firefox 32.9 10 155.30
30 Mon Other 11.8 9 120.25
31 Thu Internet Explorer 7.1 2 41.20
32 Fri Firefox 18.0 8 134.40
33 Sun Internet Explorer 11.8 4 37.17
34 Fri Internet Explorer 9.1 3 52.09
35 Tue Internet Explorer 7.8 5 71.81
36 Mon Firefox 16.5 5 59.99
37 Thu Firefox 6.2 4 84.17
38 Sat Internet Explorer 11.3 4 55.58
39 Tue Internet Explorer 10.6 2 39.06
40 Wed Internet Explorer 5.0 5 36.48
41 Tue Other 15.9 4 67.44
42 Sat Internet Explorer 18.1 7 60.14
43 Fri Firefox 10.8 4 70.38
44 Mon Internet Explorer 13.3 7 110.65
45 Mon Internet Explorer 30.1 6 104.23
46 Fri Firefox 13.7 4 68.17
47 Thu Internet Explorer 8.1 2 17.84
48 Fri Internet Explorer 9.7 5 103.15
49 Mon Other 7.3 6 52.15
50 Fri Internet Explorer 13.4 3 98.75

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