a. Make a plot of the residuals versus the independent variable.
b. From the plot, does it appear that a linear model is appropriate?
c. Looking at the residual plot, do you think that the assumption of equality of variances is violated?
d. Make a graph that shows the distribution of the residuals.
e. Does it appear that the residuals are normally distributed?
f. Considering your answers to parts (a) - (e), do you think that the linear regression model is appropriate for these data? Why or why not?
have answered on excel. Hope it is clear.
<br>To prepare enter the dataon excel and then select the data and hit chart. after creating the scatter plot , go to chart in the menu ...