29. The article An Analysis of Variance Applied to Screw Machines (Industrial Quality Control, 1956: 89) describes
Question:
29. The article “An Analysis of Variance Applied to Screw Machines” (Industrial Quality Control, 1956: 8–9) describes an experiment to investigate how the length of steel bars was affected by time of day (A), heat treatment applied (B), and screw machine used (C). The three times were 8:00 A.M., 11:00 A.M., and 3:00 P.M., and there were two treatments and four machines (a 3 2 4 factorial experiment), resulting in the accompanying data [coded as 1000(length 4.380), which does not affect the analysis].
B1 C1 C2 C3 C4 A1 6, 9, 7, 9, 1, 2, 6, 6, 1, 3 5, 5 0, 4 7, 3 A2 6, 3, 8, 7, 3, 2, 7, 9, 1, 1 4, 8 1, 0 11, 6 A3 5, 4, 10, 11, 1, 2, 10, 5, 9, 6 6, 4 6, 1 4, 8 B2 C1 C2 C3 C4 A1 4, 6, 6, 5, 1, 0, 4, 5, 0, 1 3, 4 0, 1 5, 4 A2 3, 1, 6, 4, 2, 0, 9, 4, 1, 2 1, 3 1, 1 6, 3 A3 6, 0, 8, 7, 0, 2, 4, 3, 3, 7 10, 0 4, 4 7, 0 Sums of squares include SSAB 1.646, SSAC 71.021, SSBC 1.542, SSE 447.500, and SST 1037.833.
a. Construct the ANOVA table for this data.
b. Test to see whether any of the interaction effects are significant at level .05.
c. Test to see whether any of the main effects are significant at level .05 (i.e., H0A versus HaA, etc.).
d. Use Tukey’s procedure to investigate significant differences among the four machines.
Step by Step Answer:
Probability And Statistics For Engineering And The Sciences
ISBN: 9781111802325
7th Edition
Authors: Dave Ellis, Jay L Devore