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Question
In which of the following tests is the variable of interest the difference between the values of the observations from the two samples, rather than the actual observations themselves?A. a test of hypothesis about the mean of a population of paired differences selected from two related samples
B. a test of hypothesis about the difference between the means of two normally distributed populations using independent samples
C. a test of hypothesis about the difference between two population proportions, using large independent random samples
D. a test of hypothesis about the difference between the variances of two normally distributed populations using independent samples
Answer
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A. average
B. median
C. sum
D. difference
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A. Wilcoxon rank sum test
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Q:
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B. an upward trend on the R chart.
C. a downward trend on the R chart.
D. an increasing gradual funnel pattern on the R chart.
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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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A sequence of steadily decreasing points on a control chart is called run down.
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How well the design of the product meets and exceeds the needs and expectations of the customers is called the quality of performance.
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An chart is a control chart on which individual process measurements are plotted versus time.
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