Question

I have found the mean for each data set, but I am not sure if I have calculated the MAD(mean absolute deviation)for each data set correctly. Can someone please help me?

Calculate the mean of each data set.
Soil A: 61+61+62+65+70+71+75+81+82+90=71.8; =71.8
Soil B: 59+63+69+70+72+73+76+77+78+83=72;
=72
c) Calculate the mean absolute deviation (MAD) of each data set.
Soil A:
│-10.8│²+│-10.8│²+І│9.8│²+│-6.8│²+
│-1.8│²+│-0.8│²+│3.2│²+9.2²+10.2²+18.2²
Soil A: 116.64+116.64+96.04+46.24+3.24+0.64+
10.24+84.64+104.04+331.24=909.60/10 =
√90.96 = (9.5)
Soil B: │-13│²+│-9│²+│-3│²+
│-2│²+0²+1²+4²+5²+6²+11²
Soil B:
169+81+9+4+0+1+16+25+36+121=462/10 = √46.2= 6.8)