1 |
A disadvantage of range is that it is based on. |
Absolute deviation
Square deviation
Two extreme observation
Upper and quartile
|
2 |
In symmetrical distribution if Q1 = 4, Q3 = 12 then median is. |
4
6
8
zero
|
3 |
The variance of 5,5,5,5,5 is. |
0
25
5
125
|
4 |
Second moment abut mean is. |
0
1
variance
Standard deviation
|
5 |
For a symmetrical distribution. |
B1 = 0
B1 = 3
B2 = 3
B3 = 3
|
6 |
The types of dispersion are. |
2
3
4
5
|
7 |
Which of the following statements is correct. |
Every symmetrical curve is measokurtic
Standard deviation is the mean squared deviations from the mean
The standard deviation of a constant is constant
Teh second moment about zero equals variance.
|
8 |
Mean deviationis always. |
More than S.D.
Equal to S.D.
Less than S.D.
None of these
|
9 |
The sum of squares of deviations is a minimum if these deviations are taken from the. |
Mean
Mode
Median
All of these
|
10 |
Moment ratios b1 and are. |
Expressed in original unit of the data
Dimensionless quantities
Independent of origin and scale of messurement
Both b and c
|
11 |
The distribution is positively skewed if. |
Mean < Mode
Mean > Mode
Mean > Median
Both b and c
|
12 |
The distribution is measokurtic if the moment coefficient of of kurtosis b2 is. |
Equal to 0
Equal to 3
Less than 3
Greater than zero
|
13 |
The distribution is symmetrical if the moment coefficient of skewense b1 is. |
Negative
Postive
3
0
|
14 |
The compare the variation of two or more than two sereies, we use. |
Mean absolute deviation
Variance
Coefficient of viariation
Corrected atandard deviation
|
15 |
Which measure of disperesion is considered as the best genereal purpose measure of dispersion. |
Range
Semi interquartile range
Standard deviation
Mean deviation
|
16 |
If the third moment about mean is zero ( m3 = 0) , then the distribution is. |
Mesokurtic
Positively skewed
Symmetrical
Negatively skewed
|
17 |
The mean deviation is least if deviations are taken from |
A.M
Mode
G.M
Median
|