Question: Fixing a UCL and LCL at 3 standard deviations (take area as 99.7%) means that the probability of making a Type 1 error is approximately:

Fixing a UCL and LCL at 3 standard deviations (take area as 99.7%) means that the probability of making a Type 1 error is approximately: "

A. 0.15% for each tail (above or below the UCL and LCL, respectively)"

B. "2.5% for each tail (above or below the UCL and LCL, respectively)"

C. "99.7% for each tail (above or below the UCL and LCL, respectively)"

D. "0.30% for each tail (above or below the UCL and LCL, respectively)"

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