Sandra is 36 years old. her son is 14 years old. how many years ago was sandra 3 times older than her son? years ago

16

step-by-step explanation:

2 x 40 = 80

80/5

= 16

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.