The department of commerce for a country released the data below for the quarterly retail e-commerce sales in millions of dollars for 2008 and 2009. Complete parts a through c. Year O 2008 1 Quarter 4 2009 1 3910 3 2 3 2002 3044 3158 3824 4 2 4728 Sales 5358 5428 CHE a. Produce a time-series plot of this data. Indicate the time-series components that exist in the data. OA. B. OC. Sales Q 8000 8000- ||||||| Sales ‒‒‒‒‒‒‒ ****** THING IPULA ++ •||||||| 8000 T WHHHHHH HETHEM ||||||| Q ******* G G |||||||| +||||| "d Indicate the time-series components that exist in the data. Select all that apply. A. A strong upward linear trend B. A strong downward linear trend C. A strong downward nonlinear curve D. A strong upward nonlinear curve E. The data appear to be constant. b. Conduct a test of hypothesis to determine if there exists a linear trend in these data. Use a significance level of 0.10 and the p-value approach. What are the hypotheses? Ho: The slope of the regression line is equal to zero. HA: The slope of the regression line is not equal to zero. What is the test statistic? (Round to three decimal places as needed.) Q G O D. 8000 Sales *
The department of commerce for a country released the data below for the quarterly retail e-commerce sales in millions of dollars for 2008 and 2009. Complete parts a through c. Year O 2008 1 Quarter 4 2009 1 3910 3 2 3 2002 3044 3158 3824 4 2 4728 Sales 5358 5428 CHE a. Produce a time-series plot of this data. Indicate the time-series components that exist in the data. OA. B. OC. Sales Q 8000 8000- ||||||| Sales ‒‒‒‒‒‒‒ ****** THING IPULA ++ •||||||| 8000 T WHHHHHH HETHEM ||||||| Q ******* G G |||||||| +||||| "d Indicate the time-series components that exist in the data. Select all that apply. A. A strong upward linear trend B. A strong downward linear trend C. A strong downward nonlinear curve D. A strong upward nonlinear curve E. The data appear to be constant. b. Conduct a test of hypothesis to determine if there exists a linear trend in these data. Use a significance level of 0.10 and the p-value approach. What are the hypotheses? Ho: The slope of the regression line is equal to zero. HA: The slope of the regression line is not equal to zero. What is the test statistic? (Round to three decimal places as needed.) Q G O D. 8000 Sales *
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter7: Integration
Section7.CR: Chapter 7 Review
Problem 88CR
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Transcribed Image Text:The department of commerce for a country released the data below for the quarterly retail e-commerce sales in millions of dollars for 2008 and 2009. Complete parts a through c.
Year
Quarter
2008
1
2002
2
3
4
3044 3158 3824
2009
1
3910
2
3
4728 5358
4
5428
Sales
C
a. Produce a time-series plot of this data. Indicate the time-series components that exist in the data.
O A.
B.
Sales
Q
Sales
Q
Q
8000+
8000
G
G
0-
0-
0
Indicate the time-series components that exist in the data. Select all that apply.
A. A strong upward linear trend
B. A strong downward linear trend
C. A strong downward nonlinear curve
D. A strong upward nonlinear curve
E. The data appear to be constant.
b. Conduct a test of hypothesis to determine if there exists a linear trend in these data. Use a significance level of 0.10 and the p-value approach. What are the hypotheses?
Ho: The slope of the regression line is equal to zero.
HA: The slope of the regression line is not equal to zero.
What is the test statistic?
t=
(Round to three decimal places as needed.)
0
O C.
8000
Sales
Q
G
O D.
Sales
8000-
0
Q
Q
G
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