Question

the mean deviation of the scores 12,15,18 is​

Answer 1

Step-by-step explanation:

=(12+15+18)/3

=45/3

=15

Answer 2

Answer:

Answer is 2

Step-by-step explanation:

xi      xi - mean of x     | xi - mean of xi |

12             -3                         3

15             0                          0

18             3                          3

Total No. of xi (N) is 3

addition of | xi - mean of xi | is 6

formula =  $\frac{∑ | xi- xi mean | }{N}$  = 6/3 = 2