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Question
Which one of the following nonparametric methods can be used with a single population?A. Spearman's test
B. sign test
C. Kruskal-Wallis test
D. Wilcoxon rank sum test
Answer
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If a company is using an chart for a given process with measurement data, it is generally not important or necessary to use an R chart or s chart.
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Control charts are used to reduce common causes of variation.
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An chart is a control chart on which individual process measurements are plotted versus time.
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