Chapter 11, Problem 11.21LB

A 31-run experiment was conducted with 6 independent predictor variables. The table below gives the SSres for all possible fitted models in the six variables.  Select a “best” model using each of the approaches in a-f stated below. Variables in Model SSres Variables in Model SSres Variables in Model SSres Variables in Model SSres none 11.058 x3, x4 1.453 x2, x3, x4 1.041 x1, x3, x4, x5 0.561 x1 0.607 x3, x5 9.891 x2, x3, x5 9.362 x1, x3, x4, x6 0.555 x2 10.795 x3, x6 8.848 x2, x3, x6 8.838 x1, x3, x5, x6 0.561 x3 10.633 x4, x5 1.397 x2, x4, x5 1.030 x1, x4, x5, x6 0.553 x4 1.522 x4, x6 1.507 x2, x4, x6 1.192 x2, x3, x4, x5 0.958 x5 9.922 x5, x6 7.680 x2, x5, x6 7.679 x2, x3, x4, x6 0.995 x6 9.196 x1, x2, x3 0.498 x3, x4, x5 1.383 x2, x3, x5, x6 7.675 x1, x2 0.499 x1, x2, x4 0.450 x3, x4, x6 1.437 x2, x4, x5, x6 1.024 x1, x3 0.600 x1, x2, x5 0.477 x3, x5, x6 7.678 x3, x4, x5, x6 1.342 x1, x4 0.582 x1, x2, x6 0.367 x4, x5, x6 1.352 x1, x2, x3, x4, x5 0.412 x1, x5…

An automobile dealer conducted a test to determine if the time in minutes needed to complete a minor engine tune-up depends on whether a computerized engine analyzer or an electronic analyzer is used. Because tune-up time varies among compact, intermediate, and full-sized cars, the three types of cars were used as blocks in the experiment. The data obtained follow.   Analyzer         Computerized   Electronic    Computer 51   41   Intermediate 54   44   Full-sized 63   47     Find the value of the test statistic.    Find the p-value.

When performing a x2 test for independence in a contingency table with r rows and c columns, determine the upper-tail critical value of the test statistic in each of the following circumstances. a. a = 0.05, r = 3, c = 5 b. a = 0.01, r = 3, c = 6 c. a = 0.01, r = 3, c = 4 d. a = 0.01, r = 5, c = 4 e. a = 0.01, r = 4, c = 3 a. Determine the upper-tail critical value of the test statistic using the values given in the problem statement for part (a). The critical value is (Tuno on intogor o docime Doun