+0  
 
0
32
1
avatar+4677 

Help 3

 Dec 19, 2018
 #1
avatar+94275 
+1

The mean is 49.1

 

The standard deviation is  27.8

 

So.....one SD from the mean is  from

 

49.1 - 27.8       to    49.1 + 27.8   =

 

21.3     to    76.9

 

6 scores fall into the range = 6/10 =  60%

 

This is lower than expected   (we expect 68% to fall witin the range )

 

 

cool cool cool

 Dec 19, 2018

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