Question
State the type of skewness for a frequency distribution whose three quartiles are $42, 36,$ and $40.$

Answer

Here, $Q_1=36 ; m=40 ; Q_3=42$
$Q_3+Q_1=42+36=78,2 M=2(40)=80 Q_3+Q_1<2 M$.
Therefore, frequency distribution is negatively skewed.

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