MCQ 24
76 Root mean square
deviation becomes the standard deviation when arbitrary origin concides
with
A. Mean.
B. Mode.
C. Median.
D. G.M
77 Variance is the mean
of the squares minus the
A. Square of mode.
B. Square of median.
C. Square of mean.
D. Square of H.M.
78 The standard deviation
is a very important concept that serves as basic measure of
A. Skewness.
B. Kurtosis.
C. Fluctuation.
D. Variability.
79 A smaller value of
standard deviation indicates that the most of the observations in data set are
close to the
A. Mean.
B. Median.
C. Mode.
D. G.M
80 A large value of standard deviation indicates
that the observations are scattered widely about the
A. Mean.
B. Median.
C. Mode.
D. G.M
81 To compare the
variability of two or more sets of data, we find
A. Coefficient of standard deviation.
B. Coefficient of correlation.
C. Coefficient of variation.
D. Coefficient of double variation.
82 The standard deviation
as a percentage of the arithmetic mean of a data set.
A. Coefficient of standard deviation.
B. Coefficient of correlation.
C. Coefficient of variation
D. Coefficient of double variation.
83 A pure number without
units, it is therefore used to compare the variation in two or more data set or
distribution’s that are measured in different units e.g. one may be measured in
hours and the other in Kilogram or rupees.
A. Coefficient of standard deviation.
B. Coefficient of correlation.
C. Coefficient of variation.
D. Coefficient of double variation.
84 -------------------------------
is also used to compare the performance of two candidates or two players given
their scores in various subjects or games, the smaller the
------------------------------, the more consistent is the performance of the
candidates or players.
A. Coefficient of variation.
B. Coefficient of correlation.
C. Coefficient of standard deviation.
D. Coefficient of double correlation.
85 Coefficient of
variation is unreliable when arithmetic mean is
A. Very large.
B. Very small.
C. In minus.
D. Not clear.
86 The variance of
constant is
A. One.
B. Zero.
C. Constant.
D. -1.
87 The variance is
independent of the
A. Origin.
B. Scale.
C. Values.
D. Distribution.
88 The variance increases
by a2 when the scale of x is
changed by
A.
2a.
B.
a2 .
C.
1/a.
D. a
89 The variance of the
sum or difference of two independent variables is equal to the
A. Sum of their respective variances.
B. Product of their respective variances.
C. One of the variances.
D. Difference of their respective
variances.
90 The covariance of two
independent variables is equal to
A. 1.
B. The sum of their respective variances.
C. Zero.
D. The difference of their respective
variances.
91 The mean of the
standardized variable is equal to
A. 1.
B. -1.
C. It’s mean.
D. Zero.
92 The variance of a
standardized variable is equal to
A. -1.
B. 1.
C. Zero.
D. It’s mean.
93 Mean is obtained from
the data set after having removed all the observations below the first quartile
and all the observations above the third quartile.
A. Winsorized mean.
B. An average mean.
C. Trimmed mean.
D. Quartile mean.
94 Mean is calculated from the modified data set
obtained by replacing each observation below the first quartile with the value
of the first quartile and each observation above the third quartile with the
value of third quartile.
A. Winsorized mean.
B. An average mean.
C. Trimmed mean.
D. Quartile mean.
95 A moment designates
the power to which deviations are raised before
A. Multiplying them.
B. Dividing them.
C. Simplifying them.
D. Averaging them.
96 The rth moment about
the mean is arithmetic mean of the rth power of deviations of the observations
from the
A. rth origin.
B. Median.
C. Mean.
D. Mode.
97 The moments about the
mean or about the arbitrary origin are also called the
A. Simple moments.
B. Mean moments.
C. Arbitrary moments.
D. Power moments.
98 Moment ratios are
A. μ1 and μ2
B. β1 and β2
C. Β2 and β3
D. μ2
and μ3
99 Moment ratios are
independent of
A. Origin.
B. Scale.
C. Value.
D. Origin and scale.
100 For symmetrical
distribution β1 =
A. 1.
B. 0.
C. -1.
D. 2.
Answers MCQ 24
|
76
|
A
|
77
|
C
|
78
|
D
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79
|
A
|
80
|
A
|
|
81
|
C
|
82
|
C
|
83
|
C
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84
|
A
|
85
|
B
|
|
86
|
B
|
87
|
A
|
88
|
D
|
89
|
A
|
90
|
C
|
|
91
|
D
|
92
|
B
|
93
|
C
|
94
|
A
|
95
|
D
|
|
96
|
C
|
97
|
D
|
98
|
B
|
99
|
D
|
100
|
B
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