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(Single Best Answer) Question 1: 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 quartiles being 1.5 and 4.5 litres respectively. Based on this data how many persons in the sample are expected to have a FEV between 1.5 and 4.5 litres ?
A) 75
B) 150
C) 225
D) 300
Answer (Select an option above to get the answer):
(Single Best Answer) Question 2: The number of malaria cases reported during the last 10 years in a town are given below: 250,320,190,300,5000,100,260,350,320& 160. The epidemiologist wants to find out the average number of malaria cases reported in that town during the last 10 years. The most appropriate measure of average for this data will be ?
A) Arithmetic mean
B) Mode
C) Median
D) Geometric mean
Answer (Select an option above to get the answer):
(Single Best Answer) Question 3: For a negatively skewed data mean will be ?
A) Less than median
B) More than median
C) Equal to median
D) One
Answer (Select an option above to get the answer):
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