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Question
The distance (in thousands of miles) traveled by buses before their first major motor failure is distributed below, with an estimated mean and standard deviation of 95.7 and 38.1. Also shown are the expected frequencies of these intervals if the original population was a normal distribution.
Test the hypothesis that the original population is a normal distribution at .05.
Answer
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A. average
B. median
C. sum
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How well a process is able to meet the requirements set forth by the process design is called
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B. an upward trend on the R chart.
C. a downward trend 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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