Business Statistics

81. Which of the following measures of dispersion is independent of the units employed?

1. Coefficient of variation
2. Quartile deviation
3. Standard deviation
4. Range

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82. The first and second moments about arbitrary constant are -2 and 13 respectively, The standard deviation will be:

1. -2
2. 3
3. 9
4. 13

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83. If the third central is negative, the distribution will be:

1. Symmetrical
2. Positively skewed
3. Negatively skewed
4. Normal

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84. The lack of uniformity or symmetry is called:

1. Skewness
2. Dispersion
3. Kurtosis
4. Standard deviation

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85. If mean=10, median=8 and standard deviation=6, then coefficient of skewness is:

1. 1
2. -1
3. 2/6
4. 2

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86. In a symmetrical distribution Q₁ = 20 and median= 30. The value of Q₃ is:

1. 50
2. 35
3. 40
4. 25

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87. If there are ten values each equal to 10, then standard deviation of these values is:

1. 100
2. 20
3. 10
4. 0

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