The correct answer is A. coefficient of variation.
The coefficient of variation is a measure of the dispersion of data relative to its mean. It is calculated by dividing the standard deviation by the mean. A high coefficient of variation indicates that the data is spread out over a large range of values, while a low coefficient of variation indicates that the data is clustered closely around the mean.
The coefficient of variation is often used to compare the variability of two or more sets of data. For example, if you are comparing the returns of two different investments, you could calculate the coefficient of variation for each investment and then compare the two coefficients. A higher coefficient of variation for one investment would indicate that the investment is more volatile than the other investment.
The coefficient of variation can also be used to calculate the risk of an investment. The risk of an investment is the probability that the investment will lose money. The higher the coefficient of variation, the higher the risk of the investment.
The coefficient of variation is a useful tool for investors and analysts. It can be used to compare the variability of different investments, to calculate the risk of an investment, and to make investment decisions.
Here are brief explanations of the other options:
- B. coefficient of deviation: This is not a standard term in statistics. It may be used to refer to the standard deviation, but it is not a well-defined term.
- C. coefficient of standard: This is also not a standard term in statistics. It may be used to refer to the standard deviation, but it is not a well-defined term.
- D. coefficient of return: This is a measure of the profitability of an investment. It is calculated by dividing the total return of an investment by the initial investment.