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If ?σ Is the Population Standard Deviation, K the Number

Question 111

Multiple Choice

If ?σ is the population standard deviation, k the number of samples or subgroups, and n the sample size (number of observations in each subgroup) , what is the distance from the centre line to the upper control limit?


A) σ
B) 3 σ
C) 3 σ / √k
D) 3 σ / √n

Correct Answer:

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