In the table below x denotes the X-Tract Company’s projected annual profit (in $1,000).  The table also shows the probability of earning that profit.  The negative value indicates a loss.   x f(x)   x = profit   -100 0.01   f(x) = probability -200 0.04       0         100 0.26       200 0.54       300 0.05       400 0.02         9 What is the variance of profit? a 10,187     b 10,667     c 11,170     d 11,696

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In the table below x denotes the X-Tract Company’s projected annual profit (in $1,000).  The table also shows the probability of earning that profit.  The negative value indicates a loss.

 

x f(x)   x = profit  
-100 0.01   f(x) = probability
-200 0.04      
0        
100 0.26      
200 0.54      
300 0.05      
400 0.02      

 

9 What is the variance of profit?
a 10,187    
b 10,667    
c 11,170    
d 11,696  

 

 

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