3. Steel wire was made by four manufacturers A, B, C and D. To compare the...

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3. Steel wire was made by four manufacturers A, B, C and D. To compare the strength of the wire produced by these manufacturers, ten pieces were drawn from a batch of wire made by each manufacturer and their strength measured. The results were: Manufacturer Strength of the ten pieces drawn Total 625 860 A 55 50 80 60 70 75 40 45 80 70 70 80 85 105 65 100 90 95 100 70 70 60 65 75 90 40 95 70 65 75 705 0 115 80 70 95 100 105 90 100 60 D 905 i. ii. What are the assumptions of one-way ANOVA? Is there evidence of differences in the strength of wire made by the 4 manufacturers? State your conclusions from this analysis. Which manufacturer would you recommend? 111. iv. 3. Steel wire was made by four manufacturers A, B, C and D. To compare the strength of the wire produced by these manufacturers, ten pieces were drawn from a batch of wire made by each manufacturer and their strength measured. The results were: Manufacturer Strength of the ten pieces drawn Total 625 860 A 55 50 80 60 70 75 40 45 80 70 70 80 85 105 65 100 90 95 100 70 70 60 65 75 90 40 95 70 65 75 705 0 115 80 70 95 100 105 90 100 60 D 905 i. ii. What are the assumptions of one-way ANOVA? Is there evidence of differences in the strength of wire made by the 4 manufacturers? State your conclusions from this analysis. Which manufacturer would you recommend? 111. iv.

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i Oneway ANOVA A B C D Method Null hypothesis ... View the full answer