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Questions and Answers
What formula is used to calculate the combined standard deviation of two series?
What formula is used to calculate the combined standard deviation of two series?
- CV12 = N₁(o₁ + d₁) + N₂(o₂ + d₂) / N₁ + N₂
- 123 = N₁X₁ + N₂ X₂ + N₃ X₃ N₁ + N₂ + N₃
- X123 = N₁X₁ + N₂ X₂ + N₃ X₃ / N₁ + N₂ + N₃
- 12 = N₁X₁ + N₂ X₂ N₁ + N₂ (correct)
Which measure of dispersion is given by the formula CV12?
Which measure of dispersion is given by the formula CV12?
- Mean Deviation
- Range
- Standard Deviation
- Combined Standard Deviation (correct)
What does 'd1' represent in the formula for combined standard deviation of three series?
What does 'd1' represent in the formula for combined standard deviation of three series?
- Mean of all elements in series 3
- Sum of all elements in series 1
- Difference between the mean of series 1 and series 2
- Difference of each element from the combined mean (correct)
In the context of measures of dispersion, what would be a disadvantage of using the range as a measure?
In the context of measures of dispersion, what would be a disadvantage of using the range as a measure?
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How does the coefficient of variation differ from standard deviation?
How does the coefficient of variation differ from standard deviation?
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What purpose does the Combined Coefficient of Variation (CV12) serve in statistics?
What purpose does the Combined Coefficient of Variation (CV12) serve in statistics?
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