771. If X̄ = Rs.20, S= Rs.10, then coefficient of variation is:
A.45%
B.50%
C.60%
D.65%

772. The second moment about arithmetic mean is 16, the standard deviation will be:
A.16
B.4
C.2
D.0

773. First two moments about the value 2 of a variable are 1 and 16. The variance will be:
A.13
B.15
C.16
D.Difficult to tell

774. Departure from symmetry is called:
A.Second moment
B.Kurtosis
C.Skewness
D.Variation

775. If mean=50, mode=40 and standard deviation=5, the distribution is:
A.Positively skewed
B.Negatively skewed
C.Symmetrical
D.Difficult to tell

776. In case of positively skewed distribution, the extreme values lie in the:
A.Middle
B.Left tail
C.Right tail
D.Anywhere 

777. Which of the following is correct in a negatively skewed distribution?
A. The arithmetic mean is greater than the mode
B. The arithmetic mean is greater than the median
C. (Q3 – Median) = (Median – Q1)
D. (Q3 – Median) < (Median – Q1)

778. If Q3=20 and Q1=10, the coefficient of quartile deviation is:
A.3
B.1/3
C.2/3
D.1

779. The average of squared deviations from mean is called:
A.Mean deviation
B.Variance
C.Standard deviation
D.Coefficient of variation

780. Which of the following is a unit free quantity:
A.Range
B.Standard deviation
C.Coefficient of variation
D.Arithmetic mean