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Question: a class sat a test which was graded out of...

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A class sat a test which was graded out of 40. This results are:

21 , 31 ,35 ,29

 

SD=√(-)^2+(a-b)^2+(-)^2+(-)^2

-this is the formula required for standard deviation

 

-using 4 scores samples,

-if you're using the above formula to manually calculate the sample standard deviation:

 

1. what numerical value would you substitute for the variable a in a equation above?

2. What numerical value would you substitute for the variable b in the equation above?

3. What numerical value would you substitute for the variable c in the equation above?

 

NOTE: input your answers as whole numbers with no units or symbols. 

 

 

DO IT ASAP.

WITH SOLUTIONS.

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