Problem 46 of 7
Find z-score for value x=86, mean 80, sd 3.
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compute (x-mean)/sd.
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Compute (x-mean)/sd for values above or below mean.
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Solution
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1. Subtract mean from the data value.
2. Divide by standard deviation.
3. Interpret sign as above or below mean.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using sd divided by difference.