Answer:
Rin did mistake in 3rd step
Step-by-step explanation:
Mean is correct according to rin's calculation
Absolute mean deviation is |data value-mean|
Hence, values of absolute deviations are also correct
To find the Mean absolute deviation we sum the differences of absolute deviations and then divide by the number of observations
it should be 6+6+0+7+5=24/5=4.8
Not 18/4
Hence, Rin did mistake in 3rd step