Question

1. A nickel-titanium alloy is used to make components for jet turbine aircraft engines. Cracking is a potentally serious problem in the final part, as it can lead to non-recoverable failure. A test is run at the parts producer to determine the effects of four factors on cracks. The four factors are pouring temperature (A), itanium content (B), heat treatment method (C), and the amount of grain refiner used (D). Two replicated of a 2 design are run, and the length of crack (in um) induced in a sample coupon subjected to a standard test is measured. The data are shown below: Treatment Replicate Replicate A B C D Combination 7.037 6.376 4.707 15.219 11.635 12.089 17273 17.815 10.403 10.151 4.368 4.098 9.360 9.253 13.440 12.923 8561 8.951 16.867 17.052 ab ac bc abc ad bd abd cd 13.876 13.658 19.824 19.639 11.846 2.337 6.125 5.904 11.190 10.935 15.653 15.053 bod abcd

use the half normal plot to determine factors that are significant.

Answer 1

soution ackoy aPPeay to be (aye team Effeck 3.5962.5 AB Ас AD 1.43412 0.07 6S вс 6.096 BD ABC 3. 137 ABD 098
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(b) condutt on anlysis o voience Do an of tne. oFtue s alt eet US e d= o.os. SUM neon Sourc e. valve Prob>F da 0.O16 O Oi Midel S70.95 1 S ヲ2-9! 2 126 6