SPC Test Questions & Answers
2024/2025
SPC? - ANSWERSStatistical Process Control
What is capability? - ANSWERSAbility to produce results *within range of customer specs*
"In Control" has what kinds of variation - ANSWERSCommon Cause
"Out of Control" has what kinds of variation - ANSWERSSpecial Cause
pg 256 matrix - ANSWERS
If you INCREASE the upper and lower bounds, what happens to the probability of performing a Type I
error? - ANSWERSDecreases
H0 = - ANSWERSsystem is IN CONTROL
H1 = - ANSWERSsystem is OUT OF CONTROL
When the system is out of control on a control chart - ANSWERS1 above/below limit
2 near the limit
5 above/below central line
Trend (up or down)
Erratic
Sudden Changes
Type I Error - ANSWERSThink we have a problem, DO NOT (false positive)
2024/2025
SPC? - ANSWERSStatistical Process Control
What is capability? - ANSWERSAbility to produce results *within range of customer specs*
"In Control" has what kinds of variation - ANSWERSCommon Cause
"Out of Control" has what kinds of variation - ANSWERSSpecial Cause
pg 256 matrix - ANSWERS
If you INCREASE the upper and lower bounds, what happens to the probability of performing a Type I
error? - ANSWERSDecreases
H0 = - ANSWERSsystem is IN CONTROL
H1 = - ANSWERSsystem is OUT OF CONTROL
When the system is out of control on a control chart - ANSWERS1 above/below limit
2 near the limit
5 above/below central line
Trend (up or down)
Erratic
Sudden Changes
Type I Error - ANSWERSThink we have a problem, DO NOT (false positive)