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Are there any outliers within observed sample 5; 7; 12; 6; 7; 14; 7; 21; 10;...

Are there any outliers within observed sample

5; 7; 12; 6; 7; 14; 7; 21; 10; 9; 6

Math   Statistics-And-Probability   
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Answer #1

but in R we get outlier as 21. But manually it's not.

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