Business Statistics MCQS With Answers 31 to 40

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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