A chest physician observed that the distribution of forced expiratory volume (FEV) in 300 smokers had a median value of 2.5 litres with the first and third quailes being 1.5 and 4.5 litres respectively. Based on this data now many persons in the sample ra eexpectable have a FEV between 1.5 and 4.5 litres-

A. 75

B. 150

C. 225

D. 300

Correct Answer: 150

Description: Here, it&;s given 1st and 3rd quaile, which includes 50% values . Here total is 300. So 50% means 150

Category: Social & Preventive Medicine

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