Which of the following is INCORRECT about the measure of variability?* Small variability indicates there exists smaller differences among scores O Larger measure of variability indicates larger differences among scores O indicates how observations in a data set are scattered about an average All of the above Which of the following statement about the standard deviation/s is FALSE? * A. standard deviation can never be zero O B. bell shaped distributions about 68.7% of the data falls within mean plus/minus 1 standard deviation C. standard deviation can never be negative O D. All of the above