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 Dec 18, 2018
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The mean is 82.2

 

The standard deviation is  ≈ 9.8

 

So...the srcores that fall within one SD  is

 

82.2 - 9.8  ≈ 72.4   and

62.2 + 9.8 ≈ 92

 

Note that 7 scores fall within this range  = 7/10  = 70%

 

This is close to expected  [ we expect 68%]

 

 

"C"

 

 

cool cool cool

 Dec 18, 2018
edited by CPhill  Dec 18, 2018

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