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Help 3,4

 Apr 18, 2018
 #1
avatar+101228 
+1

4.

 

 

I think this is correct NSS

 

The mean  is 28.3

The SD is  9.93

So....two SDs above the mean  is 28.3 * 2(9.3)  = 46.9

And two SDs below the mean is  28.3  - 2(9.3)  =  9.7

 

So...

 

16  is the minimum value   and 40  is the max value

 

So...all   values fall within  2 SDs  from the mean

 

 

cool cool cool

 Apr 18, 2018
 #2
avatar+101228 
+1

3

 

 

The Mean  is  111.16

The SD  is  32.8

The minimum value is 69

The max value is 158

 

So  

Two SDs  above the mean  is   111.16 + 2(32.8)   = 176.76

Two SDs  below the mean is  111.16  - 2(32.8)  = 45.56

 

So  all the values fall within 2SDs  from the mean

 

 

cool cool cool

 Apr 18, 2018

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