Given, Numbers of observations are given.

To Find: Calculate the Mean Deviation.

Formula Used: Mean Deviation =

Explanation: Here, Observations 3011, 2780, 3020, 2354, 3541, 4150, 5000 are Given.

Since, Median is the middle number of all the observation,

So, To Find the Median, Arrange the numbers in Ascending order, we get

2354, 2780, 3011, 3020, 3541, 4150, 5000

Therefore, The Median = 3020

Deviation |d| = |x-Median|

Now, The Mean Deviation is

Mean Deviation =

Hence, The Mean Deviation is 649.42