Question: Fixing a UCL and LCL at 3 standard deviations (take area as 99.73%) means that the probability of making a Type 1 error is approximately:

Fixing a UCL and LCL at 3 standard deviations (take area as 99.73%) means that the probability of making a Type 1 error is approximately: "2.5% for each tail (above or below the UCL and LCL, respectively)" "0.135% for each tail (above or below the UCL and LCL, respectively)" "0.16% for each tail (above or below the UCL and LCL, respectively)
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