135 - AIIMS community medicine mcqs or social and preventive medicine mcqs ( spm or psm ) from all previous years AIIMS papers with answers - part 28

141q: variables are arranged in ascending and descending order to calculate ?

a. mean
b. median
c. mode
d. standard deviation

 answer  b . median .

142q: which of the following diseases is not liable for extended sickness benefit for 309 days ?

a. leprosy
b. aplastic anemia
c. immature cataract with vision 6/60 or less
d. mental disease

 answer  none .

143q: when variables are not measurable , which of the following is used to represent

a. variation
b. ordinal
c. nominal
d. ratio

 answer  c . nominal 

144q: which of the following is the principal problem in cohort studies ?

a. selection bias
b. lack of follow up
c. very expensive
d. time consuming

 answer  b . lack of follow up .

145q: in normal distribution with mean 55 and standard deviation 10 , the area to right of 55 is

a. 0.6
b. 0.8
c. 0.9
d. 0.75

 answer b. 0.8