Statisticsdrillz-score of one value
A statistics problem from Statisticsdrill. Solve it with one answer box, with a fresh sample on every attempt and the worked steps and spreadsheet function in the answer, and it is checked the moment you submit.
The task
Last week a call center agent handled 33 calls in a shift. Across the group, the mean is 70 with a standard deviation of 11.3. What is the z-score of this value? Round to 2 decimal places.
What this problem teaches
The z-score counts how many standard deviations the value sits above (positive) or below (negative) the mean.
A hint if you get stuck
z = (value - mean) / standard deviation. A value below the mean has a negative z.
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