IOE366W13-Exam2-practice-sol

117521 write down the null and alternative hypothesis

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Unformatted text preview: and alternative hypothesis of the model utility test (F-test), and carry out the model utility test at 0.01 level. Answer) The null hypothesis, The alternative hypothesis, The test statistic, at least one ( where ) The critical value, At significance level .01, the null hypothesis is rejected because model is judged useful. (cf. Section „A Model Utility Test‟, p. 561) d. Find the 95% confidence interval for Answer) ̂ . ̂ 5 of 7 . Therefore, the IOE 366 Fall 2012 Practice Problem 3. The accompanying data was obtained in an experiment to investigate whether compressive st rength of concrete cylinders depends on the type of capping material used or the different batches. Each number is a cell total ( ) based on K = 3 observations. Capping Material (A) 1 2 3 Total ( ) 1 1847 1779 1806 5432 2 1942 1850 1892 5684 Batch(B) 3 4 1935 1891 1795 1785 1889 1891 5619 5567 5 1795 1626 1756 5177 Total ( ) 9410 8835 9234 =27479 (a) Write down the linear model with main effects and two-factor interaction effect. Answer) where ‟s are independent an...
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