721. If mean=25, median=30 and standard deviation=15, the distribution will be:
A.Symmetrical
B.Positively skewed
C.Negatively skewed
D.Normal

722. In a symmetrical distribution, Q3 – Q1 = 20, median = 15. Q3 is equal to:
A.5
B.15
C.20
D.25

723. The degree of peaked ness or flatness of a unimodel distribution is called:
A.Skewness
B.Symmetry
C.Dispersion
D.Kurtosis

724. In a mesokurtic or normal distribution, 4 = 243. The standard deviation is:
A.81
B.27
C.9
D.3

725. The measurements of spread or scatter of the individual values around the central point is called:
A.Measures of dispersion
B.Measures of central tendency
C.Measures of skewness
D.Measures of kurtosis

726. If all the scores on examination cluster around the mean, the dispersion is said to be:
A.Small
B.Large
C.Normal
D.Symmetrical

727. The range of the scores 29, 3, 143, 27, 99 is:
A.140
B.143
C.146
D.70

728. The sum of absolute deviations is minimum if these deviations are taken from the:
A.Mean
B.Mode
C.Median
D.Upper quartile

729. Which of the following measures of dispersion is expressed in the same units as the units of observation?
A.Variance
B.Standard deviation
C.Coefficient of variation
D.Coefficient of standard deviation

730. The standard deviation is independent of:
A.Change of origin
B.Change of scale of measurement
C.Change of origin and scale of measurement
D.Difficult to tell

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