First, if the number equals Q3+1.5IQR, is it an outlier? Second, if the number is greater...
First, if the number equals Q3+1.5IQR, is it an outlier?
Second, if the number is greater than Q3+3IQR, is it an outlier?
Third, how to determine an outlier by z-score? Should z-score bigger than 3 or 2?
Homework Answers
If the number is greater than Q3+1.5IQR is outlier, so if the number equals Q3+1.5IQR it is not outlier
As Q3+3IQR>Q3+1.5IQR so if the value is greater than Q3+3IQR so it would be greater than Q3+1.5IQR, hence it is outlier
If z score is lower than -2 or higher than 2, they are considered as considered as unusual and so outlier
z-sore bigger than 2
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