We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
-2
148
1
avatar+4116 

Help 19

 Oct 4, 2018
 #1
avatar+101788 
+1

Mean  = [ 10 + 19 + 21 + 28 + 12 +  20 + 16 ] / 7  = 18

 

Squared  differences  from  mean

(10 - 18)^2  = (-8)^2  = 64

(19 - 18)^2  = 1^2  = 1

(21 - 18)^2  =  3^2  = 9

(28 -- 18)^2  = 10^2  = 100

(12 - 18)^2  = (-6)^2  = 36

(20 - 18)^2 = 2^2  = 4

(16 -  18) ^2  =  (--2)^2  = 4

 

Variance  = sum of  squared differences / number of values = [ 64 + 1 + 9 + 100 + 36 + 4 + 4 ] / 7  = 31.14

 

 

cool cool cool

 Oct 4, 2018

13 Online Users

avatar