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　　Based on Chebyshev’s inequality, what is the minimum percentage of the observations that will lie between ±2 standard deviations of the mean for a skewed distribution?
　　A.56%.
　　B.75%.
　　C.84%.
　　D.95%.
　　Answer：B
　　Applying Chebyshev’s inequality, 1- [1/ (2)2] = 0.75, or 75%.