SOLUTION: the number of tennis balls ordered by club members of a country club pro shop has the probability distribution. balls are packaged in a can of 3. complete a table and find the mean

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Question 356183: the number of tennis balls ordered by club members of a country club pro shop has the probability distribution. balls are packaged in a can of 3. complete a table and find the mean, variance, and standard deviation for the distribution. round b, c, and d to 2 decimal places as needed.
3 P(X) 0.04
6 P(X) 0.18
9 P(X) 0.36
12 P (X) 0.36
15 P (X) 0.06



Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
 x      P(x)    x*P(x) (x-μ)^2*P(x)    
-----------------------------------   
 3	0.04	0.12	1.774224
 6	0.18	1.08	2.411208
 9	0.36	3.24	0.156816
12	0.36	4.32	1.971216
15	0.06	0.90	1.710936




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VAR=sum%28%28x-mu%29%5E2%2AP%28x%29%2Ci=1%2C5%29=8.02
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sigma=sqrt%28VAR%29=2.83