Ah, the age-old question: what's the Z-score when the average is 65, the standard deviation is 3, and the upper spec limit is 72? Clearly, the answer is D) 4.12. Or is it? *cue dramatic music*
I think the answer is C) 2.33 because Z score is calculated by subtracting the average from the upper spec limit and dividing by the standard deviation.
Wait, did they really give us the wrong units? I thought we were supposed to calculate the Z-score, not the temperature in Fahrenheit. This is clearly a trick question!
Daniel
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