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Grintield Service company's marketing director is interested in analyzing the relationship between her company's sales and the advertising dollars spent. In the course of her analysis, she selected a random sample of 21 weeks and recorded the sales for each week and the amount spent on advertising. These data are shown below: a) Identify the independent and dependent variables. b) Draw a scatter plot with the dependent variable on the vertical axis and the independent variable on the horizontal axis. c) The marketing director wishes to know if increasing the amount spent on advertising increases sales. As a first attempt, use a statistical test that will provide the required information. Use a significance level of 0.025. Upon careful consideration, the marketing manager realizes that it takes a certain amount of time for the effect of advertising to register in terms of increased sales. She therefore, asks you to find out if increasing the amount spent on advertising in the previous week increases sales of the current week. Conduct a hypothesis test to determine if, under this model, increasing the amount spent on advertising increases sales. Again, use a significance of

Grintield Service company's marketing director is interested in analyzing the relationship between her company's sales and the advertising dollars spent. In the course of her analysis, she selected a random sample of 21 weeks and recorded the sales for each week and the amount spent on advertising. These data are shown below: a) Identify the independent and dependent variables. b) Draw a scatter plot with the dependent variable on the vertical axis and the independent variable on the horizontal axis. c) The marketing director wishes to know if increasing the amount spent on advertising increases sales. As a first attempt, use a statistical test that will provide the required information. Use a significance level of 0.025. Upon careful consideration, the marketing manager realizes that it takes a certain amount of time for the effect of advertising to register in terms of increased sales. She therefore, asks you to find out if increasing the amount spent on advertising in the previous week increases sales of the current week. Conduct a hypothesis test to determine if, under this model, increasing the amount spent on advertising increases sales. Again, use a significance of

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Please show me step by step how to do part c.

 

 

Weekly Sales Advertising $4,000 $180 $2,050 $243 S3,760 $204 S1,897 $199 $2,567 $356 $4,330 $605 $5,670 $200 $2,356 $304 $3,456 $105 $1,254 $379 $4,300 $300 $3,250 $402 $4,680 $399 $4,200 $209 $2,400 $245 S1,890 $190 $3,600 $480 $5,700 $515 $5,690 $300 $2,300 $145 $1,700 $170
Transcribed Image Text:Weekly Sales Advertising $4,000 $180 $2,050 $243 S3,760 $204 S1,897 $199 $2,567 $356 $4,330 $605 $5,670 $200 $2,356 $304 $3,456 $105 $1,254 $379 $4,300 $300 $3,250 $402 $4,680 $399 $4,200 $209 $2,400 $245 S1,890 $190 $3,600 $480 $5,700 $515 $5,690 $300 $2,300 $145 $1,700 $170
2. (use Minitab) Grintield Service company's marketing director is interested in analyzing the relationship between her company's sales and the advertising dollars spent. In the course of her analysis, she selected a random sample of 21 weeks and recorded the sales for each week and the amount spent on advertising. These data are shown below: a) Identify the independent and dependent variables. b) Draw a scatter plot with the dependent variable on the vertical axis and the independent variable on the horizontal axis. c) The marketing director wishes to know if increasing the amount spent on advertising increases sales. As a first attempt, use a statistical test that will provide the required information. Use a significance level of 0.025. Upon careful consideration, the marketing manager realizes that it takes a certain amount of time for the effect of advertising to register in terms of increased sales. She therefore, asks you to find out if increasing the amount spent on advertising in the previous week increases sales of the current week. Conduct a hypothesis test to determine if, under this model, increasing the amount spent on advertising increases sales. Again, use a significance of 0.025.
Transcribed Image Text:2. (use Minitab) Grintield Service company's marketing director is interested in analyzing the relationship between her company's sales and the advertising dollars spent. In the course of her analysis, she selected a random sample of 21 weeks and recorded the sales for each week and the amount spent on advertising. These data are shown below: a) Identify the independent and dependent variables. b) Draw a scatter plot with the dependent variable on the vertical axis and the independent variable on the horizontal axis. c) The marketing director wishes to know if increasing the amount spent on advertising increases sales. As a first attempt, use a statistical test that will provide the required information. Use a significance level of 0.025. Upon careful consideration, the marketing manager realizes that it takes a certain amount of time for the effect of advertising to register in terms of increased sales. She therefore, asks you to find out if increasing the amount spent on advertising in the previous week increases sales of the current week. Conduct a hypothesis test to determine if, under this model, increasing the amount spent on advertising increases sales. Again, use a significance of 0.025.
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