__________ is the positive square root of the mean of squared deviations from mean.
Mean deviation
Standard deviation
Quartile deviation
Mode
_________ and______ are based upon deviation of values from the average.
M.D and S.D
Range and Q.D
S.D and Q.D
M.D and Q.D
Q3 can be calculated from:
______________ is not independent of scale.
Mean deviation can be calculated with the help of following formula:
which of the following statement is NOT true
Range is the easiest and simplest measure because it is the difference between two extreme items.
Quartile deviation is superior to the range as it is not affected too much by the value of extreme items.
Range and quartile deviation are based on all the items of series.
Range and quartile deviation are useful for general study of variability.
Q1 represents:
Lower quartile
Central quartile
Both (a) and (b)
Neither (a) or (b)
Co-efficient of variation is located by applying following formula:
(S.D.)2
cf is used for:
Common factor
Cumulative frequency
Common value
None of above
M.D. represents:
Median deviation
Marginal deviation
Mean
