I specifically marked the 4 questions I need help with. One of them requires an article, I can...

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I specifically marked the 4 questions I need help with. One of them requires an article, I can provide it once I have someone assigned!

Pooja · Accepted Answer

Q12. How would adding the number 10 to each of the values of a variable affect its mean standard deviation? Provide an example. 
Let we consider variable X whose values are
X= 50, 30, 25, 48, 30, 33, 35, 38
Mean =      50+30+25+48+30+33+35+38 
                                      8      
= 36.125
S. D  =  
	X
	x- 
	(x-x-)
	(X-X-)2
	50
	36.125
	13.875
	192.5156
	30
	36.125
	-6.125
	37.51563
	25
	36.125
	-11.125
	123.7656
	48
	36.125
	11.875
	141.0156
	30
	36.125
	-6.125
	37.51563
	33
	36.125
	-3.125
	9.765625
	35
	36.125
	-1.125
	1.265625
	38
	36.125
	1.875
	3.515625
	36.125
	
	
	546.875
	
	
	
	
 
= squareroot 546.875/8-1
=8.83
After adding constant 10 to each data values the value of mean and Standard deviation is 
X = 60, 40, 35, 58, 40, 43, 45, 48
Mean = 60+40+35+58+40+43+45+48/8
         =46.

I specifically marked the 4 questions I need help with. One of them requires an article, I can provide it once I have someone assigned!

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