Answer:
mean = -0.25
Step-by-step explanation:
Explanation:-
mean:- The sum of all the observations and then divided the number of observations and it is denoted by 'μ'
given data is -15 , -12 , 8 and 9
Given observations is '4' so n = 4
[tex]mean= \frac{-15-12+8+9 }{4}[/tex]
[tex]mean= \frac{-27+17}{4}[/tex]
[tex]mean = -0.25[/tex]
The mean of given data is - 0.25
