Which of the iollowing is NOT a property ofthe standard deviation? Choose the correct answer below. 0 A. When comparing variation in samples with very dierent means, it is good practice to compare the two sample standard deviations. O B. The value ot the standard deviation is never negative. C} C. The standard deviation is a measure of variation of all data values from the mean. CI D. The units of the standard deviation are the same as the units oi the original data