mean:
add all the values and divide by the number of values:
Westwood high:
64+38+50+71+60 = 283
Number of values = 5
Mean= 283/5 = 56.6
Dobson high:
58+47+55+70+45 = 275
number of values = 5
mean = 275 /5 = 55
Mean absolute deviation (MAD )
Calculate how far away is each data point from the mean, add those deviations, and divide the sum by the number of values.
Westwood high:
64-56.6 = 7.4
56.6-38 = 18.6
56.6-50 = 6.6
71-56.6 = 14.4
60-56.6 = 3.4
7.4+18.6+6.6+14.4+3.4 = 50.4
50.4 /5 = 10.08
MAD =10.8
Dobson high:
58-55 =3
55-47 = 8
5