If mary is 2 year old and her sister is half of her age, now mary is 100 years old, how old is her sister

109 is the nearest whole number/final answer! : )

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.