The robotic pick and place machine with a vacuum nozzle pickup is retested. Prev

Question

The robotic pick and place machine with a vacuum nozzle pickup is retested. Previous tests analyzed as a blocked ANOVA design resulted that neither treatments (nozzle sets) nor blocks (test conditions) where significant. In this experiment three "improved" sets of nozzles are included in tests on machines operating within manufacturer's suggested set-up guidelines within actual production runs. Percent unreliability is recorded below as the response variable in tenths of percent. Begin with a statement of any H_o and Ha. Complete the ANOVA table. Use a significance level of 95% and also estimate the p-values associated with any F-tests performed. State the appropriate course of action based upon any analyses you desire to perform. For maximum credit, analyze residuals, normality, and means using any techniques that you choose.

Explanation / Answer

ANOVA Table:

Excel formula:

P-value>0.05; cant reject H0; so no significant difference

Source SS df MSS F-sta P-value SSFactor 0.18667 3 0.062223 0.197274 0.89536 SSError 2.52333 8 0.315416 SSTotal 2.71 11

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