1. If Y = aX ± b, where a and b are any two constants and a ∦ 0, then the quartile deviation of Y values is equal to:

1. a Q.D(X) + b
2. ∣a∣ Q.D(X)
3. Q.D(X) - b
4. ∣b∣ Q.D(X)
∣a∣ Q.D(X)

2. For a symmetrical distribution:

1. β1 > 0
2. β1 < 0
3. β1 = 0
4. β1= 3
β1 = 0

3. The scatter in a series of values about the average is called:

1. Central tendency
2. Dispersion
3. Skewness
4. Symmetry
Dispersion

4. The measures of dispersion can never be:

1. Positive
2. Zero
3. Negative
4. Equal to 2
Negative

5. Which of the following is an absolute measure of dispersion?

1. Coefficient of variation
2. Coefficient of dispersion
3. Standard deviation
4. Coefficient of skewness
Standard deviation

6. If the observations of a variable X are, -4, -20, -30, -44 and -36, then the value of the range will be:

1. -48
2. 40
3. -40
4. 48
40

7. If the maximum value in a series is 25 and its range is 15, the maximum value of the series is:

1. 10
2. 15
3. 25
4. 35
10

8. Mean deviation computed from a set of data is always:

1. Negative
2. Equal to standard deviation
3. More than standard deviation
4. Less than standard deviation
Less than standard deviation

9. Which measure of dispersion has a different unit other than the unit of measurement of values:

1. Range
2. Standard deviation
3. Variance
4. Mean deviation