I am comparing 2 variables and have an outlier in

kokoszzm

kokoszzm

Answered question

2022-07-01

I am comparing 2 variables and have an outlier in x of 82.27. I want to find the z score of this outlier. When using the z score equation x-mean/standard deviation, do I use the mean and standard deviation of my x values or y values?

Answer & Explanation

Jake Mcpherson

Jake Mcpherson

Beginner2022-07-02Added 23 answers

If the observation of 82.27 belongs to the variable x, then we use the mean and standard deviation for x to find the z-score:
z = x μ x σ x = 82.27 μ x σ x

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