Calculate the mean absolute deviation $($MAD$)$ for each of the four techniques above. Use only the last $3$ months to compare the same number of months for all methods. Do not round intermediate calculations. Round your answers to the nearest whole number.

MAD $($three$-$month moving average$)$:$$

Question $5$Answer

a$.$

$5778$

b$.$

$4590$

c$.$

$-1890$

d$.$

$5333$