Ch4a5rrajaycoo Ch4a5rrajaycoo

17-05-2017
Mathematics

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For a population with u=100 and a=20, what is the z-score that corresponds to x=90?

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mreijepatmat mreijepatmat

24-05-2017

I guess that u = μ & that a=σ. If so:

μ =100 & that σ =20 & x=20

Z score = (x-μ) / σ ==> Z score = (90-100)/20 ==> Z = - 0.5

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