Question

sample of Geometry class final exam grades are as follows:
80, 85, 72, 76, 95
Find the mean absolute deviation

Answer 1

do you mean standard deviation?

Answer 2

\[mean = \frac{80+85+72+76+95}{5} = 81.6\]
\[stdev = \sqrt{\frac{\sum_{}^{}(x _{i}-mean)^{2}}{n-1}} = 8.905\]

Answer 3

mean=81.6
so mean absolute deviation is \[\frac {|80-81.6|+|85-81.6|+|72-81.6|+|76-81.6|+|95-81.6|}{5}\]