1.If you find thatr= .646, you know that:

Select one:

a.The proportion of total variation that can be explained is 64.6%

b.The proportion of total variation that can be explained is 41.7%

c.The proportion of total variation that cannot be explained is 41.7%

d.The proportion of total variation that cannot be explained is 64.6%

2.You want to estimate how much customers spend in dollars after visiting your website. You collect data from a simple random sample of 50 customers. Does the regression model using the total number of minutes spent on the website and the total number of pages viewed as predictors for the amount that is spent a good model?

Select one:

a.Yes, becausep< .05

b.No, becausep< .05

c.Yes, becausep> .05

d.No, becausep> .05

3.You want to estimate how much customers spend in dollars after visiting your website. You collect data from a simple random sample of 50 customers to investigate the statistical significance of a regression model using the total number of minutes spent on the website and the total number of pages viewed as predictors for amount spent a good model? Which of the following statements is the most accurate interpretation of the results?

Select one:

a.Overall, the model is useful becausep< .05

b.Overall, the model is useful but amount of time spent is the best predictor

c.

Overall, the model is useful but number of pages viewed is the best predictor

d.Overall, the model is useful becausep> .05

4.You want to estimate how much customers spend in dollars after visiting your website. You collect data from a simple random sample of 50 customers to investigate the statistical significance of a regression model using the total number of minutes spent on the website and the total number of pages viewed as predictors for amount spent a good model? How much of the variation in sales is explained by this model?

Select one:

a.

53.9%

b.The model is not useful

c.55.8%

d.

74.7%

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