This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Pearson’s Skewness Coefficient is given by 
Select and explain. 
A. Mean-Mode/SD, B. Mode-Mean/SD, C. SD/Mean-Median, D. SD/Median-Mean
C: SD/Mean-Median
Answer: C: SD/Mean-Median 
Explanation: • Measures of skewness:
– Pearson’s mode or First Skewness coefficient = (Mean – Mode)/SD
– Pearson’s median or Second Skewness coefficient = 3(Mean – Median)/SD
– Quartile skewness = (Q3 – 2Q2 + Q1)/Q3 – Q1