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Analysis of Frequency Distributions(Coefficient of Variation) Video Lecture | Mathematics for GRE Paper II

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FAQs on Analysis of Frequency Distributions(Coefficient of Variation) Video Lecture - Mathematics for GRE Paper II

1. What is a frequency distribution?
Ans. A frequency distribution is a table or graph that shows the frequency or number of times each value or range of values occurs in a dataset. It provides a summary of the distribution of values and helps analyze patterns or trends within the data.
2. How is the coefficient of variation calculated?
Ans. The coefficient of variation (CV) is a measure of relative variability and is calculated by dividing the standard deviation of a dataset by its mean, and then multiplying by 100 to express it as a percentage. The formula for CV is: CV = (standard deviation / mean) * 100.
3. What does the coefficient of variation indicate?
Ans. The coefficient of variation indicates the relative variability or dispersion of a dataset compared to its mean. It is often used to compare the variability of different datasets that have different units of measurement or means. A lower CV suggests less variability, while a higher CV indicates greater variability.
4. How can the coefficient of variation be interpreted?
Ans. The coefficient of variation can be interpreted as a measure of the relative risk associated with the variability of a dataset. A lower CV indicates a lower risk or volatility, while a higher CV suggests a higher risk or volatility. It is commonly used in finance, economics, and quality control to assess the stability or consistency of data.
5. Can the coefficient of variation be negative?
Ans. No, the coefficient of variation cannot be negative. It is always a non-negative value since both the standard deviation and mean are non-negative. If the standard deviation is zero (indicating no variability), the coefficient of variation is also zero.
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