Statistics

Explain right-skew and left-skew distributions (draw on whiteboard). Where are mean and median values in these cases, compared to symmetrical normal bell shape?

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Answers

Anonymous

6 months ago
3.3Strong
For left-skewed: Mean>Median - This is because majority of the high-value data points are stacked while low-value data points are sparse 
For Right-skewed: Mean<Median - This is because majority of the low-value data points are stacked while high-value data points are sparse 

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Interview question asked to Data Scientists interviewing at Microsoft, SAP Concur, Wise and others: Explain right-skew and left-skew distributions (draw on whiteboard). Where are mean and median values in these cases, compared to symmetrical normal bell shape?.