Given, Numbers of observations are given.

To Find: Calculate the Mean Deviation.

Formula Used: Mean Deviation =

Explanation: Here, Observations 38, 70, 48, 40, 42, 55, 63, 46, 54, 44 are Given.

Deviation |d| = |x-Mean|

Mean =

Mean of the Given Observations =

And, The number of observations is 10.

Now, The Mean Deviation is

Mean Deviation =

Mean Deviation of the given Observations =

Hence, The Mean Deviation is 8.4