sol10 - Homework 10 due Apr. 16 10-18 (11-18) 10-26 (11-26)...

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Unformatted text preview: Homework 10 due Apr. 16 10-18 (11-18) 10-26 (11-26) 10-31 (11-31) 10-40 (11-40) 10-49 (11-49) 10-51 (11-51) Note: the numbers in brackets are for the new edition of the textbook 10-18. a) 1) The parameter of interest is the regressor variable coefficient, 1 2) H 1 : = 3) H 1 1 : 4) = 0.05 5) The test statistic is f MS MS SS SS n R E R E 1 2 = =- / / ( ) 6) Reject H if f > f ,1,12 where f 0.05,1,12 = 4.75 7) Using results from Exercise 6-1 SS S SS S SS R xy E yy R = = -- = =- =- = . ( . ) . . . . 1 2 3298017 59 057143 137 59 159 71429 137 59143 22123 f 137 59 22123 12 74 63 = = . . / . 8) Since 74.63 > 4.75 reject H and conclude that compressive strength is a significant in predicting intrinsic permeability of concrete at = 0.05. We can therefore conclude model specifies a useful linear relationship between these two variables. P value- 2245 0 000002 . b) ....
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This homework help was uploaded on 02/26/2008 for the course IE 121 taught by Professor Perevalov during the Spring '08 term at Lehigh University .

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sol10 - Homework 10 due Apr. 16 10-18 (11-18) 10-26 (11-26)...

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