1.

Find the mean deviation of 3,9,12,15 and 18

Answer»

ANSWER:

Step-by-step explanation:

Find the mean of all values2. Find the distance of each value from that mean (subtract the mean from each value, ignore minus signs)3. Then find the mean of those DISTANCES

Like this:

Example: the Mean Deviation of 3, 6, 6, 7, 8, 11, 15, 16

Step 1: Find the mean:

Mean =  3 + 6 + 6 + 7 + 8 + 11 + 15 + 168  =  728  = 9

Step 2: Find the distance of each value from that mean:

ValueDistance from 93663637281112156167

Which looks like this:

(No minus signs!)

Step 3. Find the mean of those distances:

Mean Deviation =  6 + 3 + 3 + 2 + 1 + 2 + 6 + 78  =  308  = 3.75

 

So, the mean = 9, and the mean deviation = 3.75


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