| 1 |
Fist moment about origin in is always equal |
- A. Mean
- B. Variance
- C. Zero
- D. 1(One)
|
| 2 |
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
|
| 3 |
In a symmetrical distribution the coefficient of skewness is equal to. |
- A. -1
- B. +1
- C. 0
- D. None of these
|
| 4 |
The distribution is positively skewed if. |
- A. Mean < Mode
- B. Mean > Mode
- C. Mean > Median
- D. Both b and c
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| 5 |
The variance expresses the variability of data in ................ as unit of data. |
- A. Square of unit
- B. Squaare root of unit
- C. Same unit
- D. All of these
|
| 6 |
The S.D. of 8,8,8,8,8, is. |
- A. 8
- B. (8)<sup>2</sup>
- C. zero
- D. 5
|
| 7 |
In the grouped data , the range is the difference between. |
- A. Two extreme class frequency
- B. Two extreme class limits
- C. Tow extreme class boundaries
- D. None of these
|
| 8 |
For Laptokurtic distribution. |
- A. b2 > 3
- B. b2 < 3
- C. b2 = 3
- D. b1 > 3
|
| 9 |
First moment about mean is always equal to |
- A. One
- B. Negative
- C. Zero
- D. Positive
|
| 10 |
The mean of the absolute deviations of observations from mean, median or mode is called |
- A. Quartile deviation
- B. Absolute deviation
- C. Mean
- D. Mean deviation
|