141q: variables are arranged in ascending and descending order to calculate ?
a. mean
b. median
c. mode
d. standard deviation
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
143q: when variables are not measurable , which of the following is used to represent
a. variation
b. ordinal
c. nominal
d. ratio
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
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
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