STAT FINAL EXAM

Part A: Multiple Choice (1–11)

______1.      Using the “eyeball” method, the regression line  = 2+2x has been fitted to the data points (x = 2, y = 1), (x = 3, y = 8), and (x = 4, y = 7). The sum of the squared residuals will be

a.       7                b. 19                c. 34                d. 8

______2.      A computer statistical package has included the following quantities in its output: SST = 50, SSR = 35, and SSE = 15. How much of the variation in y is explained by the regression equation?

a.       49%           b. 70%             c. 35%             d. 15%

______3.       In testing the significance of b, the null hypothesis is generally that

a.       β = b          b. β  0                       c. β = 0                        d. β = r

______4.      Testing whether the slope of the population regression line could be zero is equivalent to testing whether the population _____________ could be zero.

a.       standard error of estimate                         c. y-intercept

prediction interval                                           d. coefficient of correlation