Question 4

The below data represent the advertising expenditure and sales of XYZ Ltd fromyear2008to2021.

Table:AdvertisingExpenditurevs.Salesfrom2008to2021

a. Develop a scatter diagram for the two variables and display the linear regression equation and R square value on the chart. What does the scatter diagram indicate about the relationship between the two variables?

b. Develop the estimated regression equation using the Excel tools pack. Interpret the coefficients of the regression model.

c. Test for a significant relationship. Use a= .05.

d. Did the estimated regression equation provide a good fit?

QUESHGD 4 The below deter represent the advertising expenditure and sales of XYZ Ltd from year EDGE to 2021. Table: Advertising Expenditure ire. Sales from 2W3 to 2021 4. Year m - -_