If a sample of items is taken and the mean of the sample is outside the control limits, the process is: in control, but not capable of producing within the established control limits. producing high quality products. likely out of control and the cause should be investigated. monitored closely to see if the next sample mean will also fall outside the control limits. within the established control limits with only natural causes of variation.

likely out of control and the cause should be investigated.

Explanation: The Mean is a term used both in Statistics, Economics, mathematics etc to describe the average of a set of numbers. The Arithmetic mean can be calculated by adding up a set of numbers and dividing the number by the frequency or the number of occurrences.

IF A MEAN IS WITHIN THE LIMITS OF A SET OF NUMBERS THE PROCESS IS SAID TO BE UNDER CONTROL WHILE IF THE MEAN IS OUTSIDE THE LIMITS OF A SET OF NUMBERS THE PROCESS IS SAID TO BE LIKELY OUT IF CONTROL AND THE ROOT CAUSE HAS TO INVESTIGATED TO ESTABLISH THE ROOT CAUSE.

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