The boundary points that define the acceptable values for an output variable are called:

Select one:

A. Capacity limits

B. Tolerance limits

C. Acceptable Limits

D. Control limits

If the lower-control limit of a p chart is negative,

Select one:

A. A mistake has been made in the comoutations

B. Use the absolute value of the lower limit

C. It is set to zero

D. None of the above

A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production period each day for 14 days and records the sample mean and range for each day.

Mean (in minutes)	Range
58.5	5.1
47.6	7.8
64.3	6.1
60.6	5.7
63.7	6.2
57.5	6.0
55.0	5.4
54.9	6.1
55.0	5.9
62.7	5.0
61.9	7.1
60.0	6.5
58.3	5.9
52.0	5.2

Suppose the analyst constructs an R-chart to see if the variability in production times is in-control. What are the Lower and upper control limits for this chart?

Select one:

A. 1.968 - 10.032

B. 0.456 - 11.544

C. 1.338 - 10.662

D. 0 - 11.544

A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production period each day for 14 days and records the sample mean and range for each day.

Mean (in minutes)	Range
58.5	5.1
47.6	7.8
64.3	6.1
60.6	5.7
63.7	6.2
57.5	6.0
55.0	5.4
54.9	6.1
55.0	5.9
62.7	5.0
61.9	7.1
60.0	6.5
58.3	5.9
52.0	5.2

Suppose the analyst constructs an -chart to see if the production process is in-control. What are the Lower and upper control limits for this chart?

Select one:

A. 56.152 - 59.848

B. 56.59 - 59.41

C. 55.486 - 60.514

D. 56.662 - 59.338

A control chart in which one or more points fall outside the upper control limit suggests a process that appears to be operating in a state of statistical control

Select one:

True

False

The constants A₂, D₃ and D₄ can only be determined if the process standard deviation is given

Select one:

True

False