| 1 |
The variance of 5,5,5,5,5 is. |
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| 2 |
The mean deviation is least if deviations are taken from |
- A. A.M
- B. Mode
- C. G.M
- D. Median
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| 3 |
First moment about mean is always equal to |
- A. One
- B. Negative
- C. Zero
- D. Positive
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| 4 |
In symmetrical distribution if Q1 = 4, Q3 = 12 then median is. |
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| 5 |
The range of the scores 19,3,140,25,95,is |
- A. 140
- B. 137
- C. 143
- D. 3
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| 6 |
Which of the following measures of dispersion is independent of the units employed. |
- A. Standard deviation
- B. Quartile deviation
- C. <sub>Coefficient of variation</sub>
- D. Variance
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| 7 |
Fist moment about origin in is always equal |
- A. Mean
- B. Variance
- C. Zero
- D. 1(One)
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| 8 |
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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| 9 |
Which of the following statements is correct. |
- A. Every symmetrical curve is measokurtic
- B. Standard deviation is the mean squared deviations from the mean
- C. The standard deviation of a constant is constant
- D. Teh second moment about zero equals variance.
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| 10 |
Range can be calculated in open-end classes. |
- A. Never
- B. Always
- C. Often
- D. Seldom
|