At a recent Marc Anthony concert, a survey was conducted that asked a random sample of 20 people their age and how many concerts they have attended since the first of the year. The data were collected in Marc Anthony Concert. xlsx . Plot the residuals against the predicted values. Which of the following statement is correct about the required conditions for the regression model?
i. The variance of the error variable does not appear to be constant; therefore heteroscedasticity is a problem and the mean of residuals is not a. zero.
ii. None of the choices are true.
iii. The variance of the error variable does not appear to be constant; therefore heteroscedasticity is a problem but the mean of residuals is zero.
iv. The variance of the error variable appears to be constant; therefore heteroscedasticity is not a problem and the mean of residuals is zero.
Age 62 57 40 49 67 54
Number of Concerts 6 5 4 3 5 5 2 6 43 3 1 3 2 65 54 41 44 48 55 60 59 63 69 40 4 5 4 5 4 2 2 38 52 1 3