The smaller the spread of scores around the arithmetic mean,
举一反三
- The smaller the spread of scores around the arithmetic mean, A: the smaller the interquartile range. B: the smaller the standard deviation. C: the smaller the coefficient of variation. D: All the above.
- When analyzing investment returns, which of the following statements is correct? A: The geometric mean will exceed the arithmetic mean for a series with non-zero variance. B: The geometric mean measures an investment’s compound rate of growth over multiple periods. C: The arithmetic mean accurately estimates an investment’s terminal value over multiple periods.
- The average (arithmetic mean) of five number is 26. After one of the numbers is removed, the average (arithmetic mean) of the remaining numbers is 25. What number has been removed ？（） A: 20 B: 25 C: 26 D: 30 E: 32
- The average (arithmetic mean) of five number is 26. After one of the numbers is removed, the average (arithmetic mean) of the remaining numbers is 25. What number has been removed A: 20 B: 25 C: 26 D: 30 E: (E) 32
- Choose the correct expressions to complete the sentences.It's a weird fashion craze, which has _______ the country. A: spread around B: spread under