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Plot a scatter diagram (for non-PHStat2 users, just find scatter plot in "Insert" tab in Excel). Does it appear that there is a linear relationship between advertising cost and sales? Why or why not? 2. Compute the correlation coefficient and INTERPRET. 3. From the scatter plot, is it reasonable to perform simple linear regression between the two variables? Why or why not? 4. What is a reasonable choice for the dependent and independent variables. Why? NOTE: please answer ASAP. I really need help.

Plot a scatter diagram (for non-PHStat2 users, just find scatter plot in "Insert" tab in Excel). Does it appear that there is a linear relationship between advertising cost and sales? Why or why not? 2. Compute the correlation coefficient and INTERPRET. 3. From the scatter plot, is it reasonable to perform simple linear regression between the two variables? Why or why not? 4. What is a reasonable choice for the dependent and independent variables. Why? NOTE: please answer ASAP. I really need help.

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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1. Plot a scatter diagram (for non-PHStat2 users, just find scatter plot in "Insert" tab in Excel). Does it appear that there is a linear relationship between advertising cost and sales? Why or why not? 2. Compute the correlation coefficient and INTERPRET. 3. From the scatter plot, is it reasonable to perform simple linear regression between the two variables? Why or why not? 4. What is a reasonable choice for the dependent and independent variables. Why? NOTE: please answer ASAP. I really need help.
PART 2. PROBLEM SOLVING Solve the following problems. Show all pertinent solutions. No immediate rounding. Round off final answers to THREE decimal places. The following data set shows the weekly advertising expenditure and sales of 12 retail merchants selling face masks. Advertising cost ($) 60 40 45 40 50 70 60 40 70 60 45 70 Sales ($) 385 400 395 365 475 440 490 420 560 525 480 510
Transcribed Image Text:PART 2. PROBLEM SOLVING Solve the following problems. Show all pertinent solutions. No immediate rounding. Round off final answers to THREE decimal places. The following data set shows the weekly advertising expenditure and sales of 12 retail merchants selling face masks. Advertising cost ($) 60 40 45 40 50 70 60 40 70 60 45 70 Sales ($) 385 400 395 365 475 440 490 420 560 525 480 510
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