For an x-bar chart where the standard deviation is known,the Upper Control Limit
A)is 3 .σ below the mean of sample means for a 3σ control chart.
B)is 3 .σ above the mean of sample means for a 3σ control chart.
C)is 3 .σ/ below the mean of sample means for a 3σ control chart.
D)is 3 .σ/ above the mean of sample means for a 3σ control chart.
E)Cannot be calculated unless the average range is known.

Question

For an x-bar chart where the standard deviation is known,the Upper Control Limit
A)is 3 .σ below the mean of sample means for a 3σ control chart. 
B)is 3 .σ above the mean of sample means for a 3σ control chart. 
C)is 3 .σ/ below the mean of sample means for a 3σ control chart. 
D)is 3 .σ/ above the mean of sample means for a 3σ control chart. 
E)Cannot be calculated unless the average range is known.

Quizplus · Accepted Answer

The Answer of For an x-bar chart where the standard deviation is known,the Upper Control Limit
A)is 3 .σ below the mean of sample means for a 3σ control chart. 
B)is 3 .σ above the mean of sample means for a 3σ control chart. 
C)is 3 .σ/ below the mean of sample means for a 3σ control chart. 
D)is 3 .σ/ above the mean of sample means for a 3σ control chart. 
E)Cannot be calculated unless the average range is known.

For an X-Bar Chart Where the Standard Deviation Is Known,the