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It has been hypothesized that treatments (after casting) of a plastic used in optic lenses will improve wear. Four different treatments are to be tested. To determine whether any differences in mean wear exist among treatments, 28 castings from a single formulation of the plastic were made and seven castings were randomly assigned to each of the treatments. Wear was determined by measuring the increase in "haze" after 200 cycles of abrasion (better wear being indicated by smaller increases). The data collected is what follows. Is there evidence of a difference in mean wear among the four treatments? Use a =.05. Utilize the approach suggested in lecture: ANOVA, Levene, Tukey/Dunnett. Treatment A 9.16 B 11.95 13.29 15.15 12.07 14.75 11.97 14.79 13.31 15.48 12.32 13.47 11.78 13.06 C 11.47 9.54 11.26 13.66 11.18 15.03 14.86 D 11.35 8.73 10.00 9.75 11.71 12.45 12.38

It has been hypothesized that treatments (after casting) of a plastic used in optic lenses will improve wear. Four different treatments are to be tested. To determine whether any differences in mean wear exist among treatments, 28 castings from a single formulation of the plastic were made and seven castings were randomly assigned to each of the treatments. Wear was determined by measuring the increase in "haze" after 200 cycles of abrasion (better wear being indicated by smaller increases). The data collected is what follows. Is there evidence of a difference in mean wear among the four treatments? Use a =.05. Utilize the approach suggested in lecture: ANOVA, Levene, Tukey/Dunnett. Treatment A 9.16 B 11.95 13.29 15.15 12.07 14.75 11.97 14.79 13.31 15.48 12.32 13.47 11.78 13.06 C 11.47 9.54 11.26 13.66 11.18 15.03 14.86 D 11.35 8.73 10.00 9.75 11.71 12.45 12.38

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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(#2) It has been hypothesized that treatments (after casting) of a plastic used in optic lenses will improve wear. Four different treatments are to be tested. To determine whether any differences in mean wear exist among treatments, 28 castings from a single formulation of the plastic were made and seven castings were randomly assigned to each of the treatments. Wear was determined by measuring the increase in “haze” after 200 cycles of abrasion (better wear being indicated by smaller increases). The data collected is what follows. Is there evidence of a difference in mean wear among the four treatments? Use a =.05. Utilize the approach suggested in lecture: ANOVA, Levene, Tukey/Dunnett. Treatment A B 9.16 11.95 13.29 15.15 12.07 14.75 11.97 14.79 13.31 15.48 12.32 13.47 11.78 13.06 C 11.47 9.54 11.26 13.66 11.18 15.03 14.86 D 11.35 8.73 10.00 9.75 11.71 12.45 12.38
Transcribed Image Text:(#2) It has been hypothesized that treatments (after casting) of a plastic used in optic lenses will improve wear. Four different treatments are to be tested. To determine whether any differences in mean wear exist among treatments, 28 castings from a single formulation of the plastic were made and seven castings were randomly assigned to each of the treatments. Wear was determined by measuring the increase in “haze” after 200 cycles of abrasion (better wear being indicated by smaller increases). The data collected is what follows. Is there evidence of a difference in mean wear among the four treatments? Use a =.05. Utilize the approach suggested in lecture: ANOVA, Levene, Tukey/Dunnett. Treatment A B 9.16 11.95 13.29 15.15 12.07 14.75 11.97 14.79 13.31 15.48 12.32 13.47 11.78 13.06 C 11.47 9.54 11.26 13.66 11.18 15.03 14.86 D 11.35 8.73 10.00 9.75 11.71 12.45 12.38
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