| 1 |
The positive square root of the mean of the squares of deviations of values from their mean is |
- A. Variance
- B. Covariance
- C. Standard deviation
- D. Standard error
|
| 2 |
Which is a poor measure of dispersion in open-end distribution. |
- A. Range
- B. Standard deviation
- C. Variance
- D. A.M
|
| 3 |
First central moment is always. |
|
| 4 |
The mean deviation can never be |
- A. Positive
- B. Negative
- C. Zero
- D. None of these
|
| 5 |
In a symmetrical distribution, the coefficient of skewness will always be. |
- A. Negative
- B. zero
- C. 1
- D. -1
|
| 6 |
For symmetrical distribution mega 3 is. |
|
| 7 |
Range can be calculated in open-end classes. |
- A. Never
- B. Always
- C. Often
- D. Seldom
|
| 8 |
A disadvantage of range is that it is based on. |
- A. Absolute deviation
- B. Square deviation
- C. Two extreme observation
- D. Upper and quartile
|
| 9 |
The measures of disperesin are chaged by the change of. |
- A. Origin
- B. Scale
- C. Both a and b
- D. None of these
|
| 10 |
The S.D. of 8,8,8,8,8, is. |
- A. 8
- B. (8)<sup>2</sup>
- C. zero
- D. 5
|