Q1. A distribution with a mode of 10 and a range of 2 to 25 would most likely be: A) normally distributed. B) positively skewed. C) negatively skewed.
Q2. Which of the following statements about statistical concepts is least accurate? A) The coefficient of variation is useful when comparing dispersion of data measured in different units or having large differences in their means. B) For a normal distribution, only 95% of the observations lie within ±3 standard deviations from the mean. C) For any distribution, based on Chebyshev’s Inequality, 75% of the observations lie within ±2 standard deviations from the mean.
Q3. Which of the following statements regarding skewness is least accurate? A) In a skewed distribution, 95% of all values will lie within plus or minus two standard deviations of the mean. B) A distribution that is not symmetrical has skew not equal to zero. C) A positively skewed distribution is characterized by many small losses and a few extreme gains.
Q4. If a distribution is skewed: A) the magnitude of positive deviations from the mean is different from the magnitude of negative deviations from the mean. B) it will be more or less peaked reflecting a greater or lesser concentration of returns around the mean. C) each side of a return distribution is the mirror image of the other.
| 
发表于 2009-1-8 17:50
| 
