TABLE 18-4 A Factory Supervisor Is Concerned That the Time It Takes

question 125

Multiple Choice

TABLE 18-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits.The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours.The sample mean and range for each hour are listed below. She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds,respectively.
-Referring to Table 18-4,suppose the supervisor constructs an R chart to see if the variability in collection times is in-control.What are the lower and upper control limits for this R chart?

• A)-2.33,43.13
• B)-2.28,42.28
• C)0,42.28
• D)0,43.13

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Definitions:

n

In statistical contexts, 'n' typically represents the sample size or number of observations in a dataset.

Sample Size

The number of observations or individuals sampled from a population for the purpose of a study or experiment.

Population Size

The total number of individuals or units in the group that is being studied.

Sum of Scores

The total value obtained by adding together all scores or values in a data set.