Business Statistics MCQS With Answers 31 to 40

 

Business Statistics

31. The first three moments of a distribution about the mean X are 1, 4 and 0. The distribution is:

1. Symmetrical
2. Skewed to the left
3. Skewed to the right
4. Normal

Correct answer: (A)
Symmetrical

32. For a positively skewed distribution, mean is always:

1. Less than the median
2. Less than the mode
3. Greater than the mode
4. Difficult to tell

Correct answer: (C)
Greater than the mode

33. Bowley's coefficient of skewness lies between:

1. 0 and 1
2. 1 and +1
3. -1 and 0
4. -2 and +2

Correct answer: (B)
1 and +1

34. The second and fourth moments about mean are 4 and 48 respectively, then the distribution is:

1. Leptokurtic
2. Platykurtic
3. Mesokurtic or normal
4. Positively skewed

Correct answer: (C)
Mesokurtic or normal

35. The measures used to calculate the variation present among the observations in the unit of the variable is called:

1. Relative measures of dispersion
2. Coefficient of skewness
3. Absolute measures of dispersion
4. Coefficient of variation

Correct answer: (C)
Absolute measures of dispersion

36. The measure of dispersion which uses only two observations is called:

1. Mean
2. Median
3. Range
4. Coefficient of variation

Correct answer: (C)
Range

37. Half of the difference between upper and lower quartiles is called:

1. Interquartile range
2. Quartile deviation
3. Mean deviation
4. Standard deviation

Correct answer: (B)
Quartile deviation

38. The mean deviation of the scores 12, 15, 18 is:

1. 6
2. 0
3. 3
4. 2

Correct answer: (D)
2

39. The variance is zero only if all observations are the:

1. Different
2. Square
3. Square root
4. Same

Correct answer: (D)
Same

40. The standard deviation of -5, -5, -5, -5, 5 is:

1. -5
2. +5
3. 0
4. -25

Correct answer: (C)
0

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