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Homework7_S11

# Homework7_S11 - STAT 496 Spring 2011 Homework Assignment#7...

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STAT 496, Spring 2011 Homework Assignment #7, Due by Thursday, April 14 1. An experiment involving a wire bonder is reported in “How to Optimize and Control the Wire Binding Process: Part I” by Scheaffer and Levine, Solid State Technology, November, 1990. The five factors and levels are given below. Level Factor Low (–) High (+) A: Constant Velocity 0.6 in./sec 1.2 in./sec B: Temperature 150 o C 200 o C C: Bond Force 80 g 120 g D: Ultrasonic Power 120 mW 200 mW E: Bond Time 10 ms 20 ms The response variable, Y, was a force (in grams) required to pull wire bonds made on the machine under a particular combination of levels of the factors. The levels and responses for the 2 5–1 fractional factorial experiment are given below. Factor Treatment Combination A B C D E=ABCD Force, g e + 8.5 a + 7.9 b + 7.7 abe + + + 8.7 c + 9.0 ace + + + 9.2 bce + + + 8.6 abc + + + 9.5 d + 5.8 ade + + + 8.0 bde + + + 7.8 abd + + + 8.7 cde + + + 6.9 acd + + + 8.5 bcd + + + 8.6 abcde + + + + + 8.6 a) Give the defining relation.

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• Spring '08
• Staff
• Statistical significance, Statistical power, Effect size, Response surface methodology, Orthogonal polynomials

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Homework7_S11 - STAT 496 Spring 2011 Homework Assignment#7...

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