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Quiz 4 (Page 3) - IME326 Engineering Test Design and...

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Unformatted text preview: IME326 Engineering Test Design and Analysis 8. An article in the Journal of Strain Amber's (Vol.- 18 No. 2, 1983) compares several procedures for predicting the shear strength for steel plate girders. Date for nine girders in the form of the ratio of predicted to observed load for two of these procedures, the Karlsruhe and the Lehigh methods, are as follows: Girder Karlsruhe Method Lehigh Method SI/l 1.186 1.061 821' 1 1.151 0.992 $3f1 1.322 1.063 84/1 1.339 1.062 SSH 1.200 1.065" 52/1 1.402 1.178 52/2 1.365 1.037 82/3 1.537 1.086 52M 1.559 1.052 a) Is there en}r evidence to support a claim that there is a difference in mean performance between the two methods? Using ct = 0.05. 7- : 6. J r s '. - rh— 0 u, M. - x4. :5; r. u... a Hi: {4, #4.. b) What is the P-value for the test in part a) t“ c) Construct a 95% confidence interval for the difference in mean predicted to observe load. {NH-923350} Page 3 of 3 ...
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