| 1 |
The distribution is positively skewed if. |
- A. Mean < Mode
- B. Mean > Mode
- C. Mean > Median
- D. Both b and c
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| 2 |
First moment about mean is always equal to |
- A. One
- B. Negative
- C. Zero
- D. Positive
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| 3 |
Why is it necessary to square the difference from the mean when computing the standard deviation. |
- A. So that the extreme values will not affect the calculation
- B. Some of the differnece will be positive and some will e negative
- C. It can change drastically from one data set to the next
- D. It is determined by only two points in the data set
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| 4 |
The types of dispersion are. |
|
| 5 |
Range can be calculated in open-end classes. |
- A. Never
- B. Always
- C. Often
- D. Seldom
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| 6 |
the standard deviation is independent of. |
- A. Change of origin
- B. Change of scale of measurement
- C. Change origin and scale of meaturement
- D. None of these
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| 7 |
The sum of squares of deviations is a minimum if these deviations are taken from the. |
- A. Mean
- B. Mode
- C. Median
- D. All of these
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| 8 |
Second moment about mean is called |
- A. Standard deviation
- B. Mean deviation
- C. Variance
- D. Coefficient of variation
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| 9 |
If b<sub>2</sub> = 3, then the distribution is: |
- A. leptokurtic
- B. Platykurtic
- C. Normal
- D. None of these
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| 10 |
The variance of 5,5,5,5,5 is. |
|