Efetue os cálculos a seguir e, quando possível simplifique o resultado

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

How can you find the mean absolute deviation (mad) for this set of data?