You Want to Determine the Lower Control Line for a P-Chart

question 31

Multiple Choice

You want to determine the lower control line for a p-chart for quality control purposes.You take several samples of a size of 50 items in your production process.From the samples, you determine the fraction defective is 0.006 and the standard deviation is 0.001.If the desired confidence level is 99.7 percent, which of the following is the resulting LCL value for the line?

• A)0.0
• B)0.002
• C)0.003
• D)0.004
• E)None of these

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Definitions:

Grand Mean

The overall mean calculated from multiple sets of observations or groups.

Total Sum

The aggregate or combined total of all the values in a set of numbers.

F Distribution

A probability distribution that is used in ANOVA tests, describing the ratio of variances between and within samples.

Test Statistic

A value computed from sample data during a hypothesis test used to decide whether to reject the null hypothesis.