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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