Kinda hard for me to explain so ill use an example:
lets say you earn $5 every 3.4 seconds how much will you have in an hour

what do i use to calculate things like that?

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.

i think it would be 42cm