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KIM D.

asked • 05/17/21

What is the Z-score for this question

The mean score on a exam is 65. The standard deviation is 15. Tanja scored a 35 this tells us that.

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Mike D. answered • 05/17/21

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Z = (X-μ)/ σ = (35-65) / 15 = -2

So her score is 2 standard deviations lower than the mean . So about 98% of students got a higher grade than her.

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