Consider the results for the rate of return for a random sample of 25 mutual funds over the previous 3-year (X) and 5-year (Y) periods. Given the 3-year rate of return of 3.24, what is the lower limit of the prediction interval for the 5-year rate of return with 92% confidence coefficient?

Consider an estimated linear regression model with a response Y and 5 predictors X1, X2, X3, X4, Xs based on home sales in the city. For a random sample of 130 homes sold recently, the following estimates are obtained using Excel. Coefficients Standard Error Intercept 23623.719 22840.352 X1 68.159029 16.178875 X2 -1246.1203 9724.738 X3 20959.507 13294.875 X4 3600.7897 10684.008 X5 -615.19279 156.92591 Find the upper limit of the change in the mean response for a unit change in X5 with 95% confidence coefficient, assuming that the other predictors remain unchanged over the period.