Five different variations of a bolt-making process are run to seeif any of them

Question

Five different variations of a bolt-making process are run to seeif any of them can increase the mean breaking strength of the boltsover that of the current process. The P-values are 0.13 0.34 0.030.28 0.38 Of the following choices, which is the best thingto do next?

i.Implement the process whose P-value was 0.03, since it performedthe best.
ii.Since none of the processes had Bonferroni- adjusted P-valuesless than 0.05, we should stick with the current process.
iii.Return the process whose P-value was 0.03 to see if it remainssmall in the absence of multiple testing.
iv.Return all the five variations again, to see if any of themproduce a small P-value the second time around.

Explanation / Answer

iv.Return all the five variations again, to see if any of them produce a small P-value the second time around.

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