The page of senior citizens from a sample of 10 seniors are

The page of senior citizens from a sample of 10 seniors are. 69 71 63 70 73 74 76 65 Calculate the coefficent of variation of the senior citizen 0.06 0.07 0.08 0.09

Solution

Getting the mean, X,          
          
X = Sum(x) / n          
Sum(x) =    693      
As n =    10      
Thus,          
X =    69.3      
          
Setting up tables,          
x   x - X   (x - X)^2  
69   -0.3   0.09  
71   1.7   2.89  
63   -6.3   39.69  
64   -5.3   28.09  
68   -1.3   1.69  
70   0.7   0.49  
73   3.7   13.69  
74   4.7   22.09  
76   6.7   44.89  
65   -4.3   18.49  
          
          
          
Thus, Sum(x - X)^2 =    172.1      
          
Thus, as           
          
s^2 = Sum(x - X)^2 / (n - 1)          
          
As n =    10      
          
s^2 =    19.12222222      
          
Thus,          
          
s =    4.37289632      
          
Thusm

coefficient of variation = s/mean =    0.063100957   = 0.06 [ANSWER, A]  

 The page of senior citizens from a sample of 10 seniors are. 69 71 63 70 73 74 76 65 Calculate the coefficent of variation of the senior citizen 0.06 0.07 0.08

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