The weekly demand of a​ slow-moving product has the probability mass function shown in the image attached. Find the variance and standard deviaton of weekly demand   The variance of weekly demand is ​(Type an integer or a decimal. Do not​ round.) The standard deviation of weekly demand is ​(Type an integer or a decimal. Do not​ round.)

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The weekly demand of a​ slow-moving product has the probability mass function shown in the image attached.
Find the variance and standard deviaton of weekly demand
 
The variance of weekly demand is
​(Type an integer or a decimal. Do not​ round.)
The standard deviation of weekly demand is
​(Type an integer or a decimal. Do not​ round.)
Demand, x
Probability, f(x)
0.2
1
0.4
2
0.1
0.3
4 or more
0.0
Transcribed Image Text:Demand, x Probability, f(x) 0.2 1 0.4 2 0.1 0.3 4 or more 0.0
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