Answer the following:1. Plot a scatter diagram. Does it appear that there is a linear relationship between advertising cost and sales? Why or why not?2. Compute the correlation coefficient. (Round of to 4 decimal places.)3. Interpret the computed correlation coefficient. PROBLEM SOLVING. Use Excel to answer thefollowing questions.The following data set shows the weeklyadvertising expenditure and sales of 12 retailmerchants selling face masks.Advertising cost ($)402025203050402050402550Sales ($)385400395365475440490420560525480510

The following data has been provided: Advertising Cost (x) Sales(Y) 40 385 20 400 25 395…

PROBLEM SOLVING. Use Excel to answer the following questions. The following data set shows the weekly advertising expenditure and sales of 12 retail merchants selling face masks. Advertising cost ($) 40 20 25 20 30 50 40 20 50 Sales ($) 385 400 395 365 475 440 490 420 560

PROBLEM SOLVING. Use Excel to answer the following questions. The following data set shows the weekly advertising expenditure and sales of 12 retail merchants selling face masks. Advertising cost ($) 40 20 25 20 30 50 40 20 50 Sales ($) 385 400 395 365 475 440 490 420 560

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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A . Calculate the equation of the LSRL. Round the slope & y-intercept to 2 decimal places. B . What is the meaning of the slope (use context) C . Write the correlation coefficient for this data
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Use the data to the right to complete parts (a) through (d) below. Percentage Who Won't Try Don't Approve of Sushi Marriage Equality Generation Millennials y 32 39 Gen X Boomers Silent/Greatest Generation 54 52 61 55 69 66 a. Determine the correlation coefficient between the percentage of people who won't try sushi and the percentage who do not approve of marriage equality. (Do not round until the final answer. Then round to two decimal places as needed.) b. What explanations can you offer for the correlation coefficient in part (a)? Choose the correct answer below. O A. Unwillingness to try sushi and disapproval of marriage equality have a weak positive correlation. O B. Unwillingness to try sushi and disapproval of marriage equality have a strong negative correlation. C. Unwillingness to try sushi and disapproval of marriage equality have no correlation. O D. Unwillingness to try sushi and disapproval of marriage equality have a strong positive correlation. c. Find the equation of…
Jim and Larry run a soup stand. The data below represents the sales of soup that they had on 8 randomly selected days, along with the high temperature on that day. a) Create a scatter diagram for this data set and comment on whether there is a positive or negative relationship between these variables.b) Calculate the correlation coefficient between temperature and sales.c) Does a linear relationship exist between these variables? Explain to me why or why not this is the case.d) Using excel, calculate the least squares regression equation for this data set. e) Using your equation, predict the soup sales on a day where the temperature is 29 degrees.f) Interpret the slope of this equation.g) Can we use this data set and regression equation to predict the sales on a day when the average temperature is 102 degrees? Why or why not?h) What is the R-squared for this equation? How do you interpret that R-squared?
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