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Athanasios
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45 19 1 1
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Mean and Standard Deviation of a Discrete Random Variable Probability Distribution

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Hi,

 

Can comeone please help me with calculating the the mean and standard deviation of the following discrete random variable probability distribution.

 

26-08-2016 6-49-46 PM.jpg*k = 0.14

 

 

I would like the mean and standard deviation of the number of people per car.

 

I have used the 'Statistics 1 VAR App' and I have entered the following:

 

26-08-2016 6-57-09 PM.jpg

 

When I click 'Stats' the following appears:

 

26-08-2016 7-47-56 PM.jpg

 

26-08-2016 7-48-09 PM.jpg

 

The answers (rounded to two decimal places) for the mean and standard deviation should be:

Mean = 3.67

Standard Deviation = 1.31

 

It seems that the statistical calculations are based on the 'D1' column only.

 

Can someone please show me how I can set the statistical calculations to include the data of columns 'D1' and 'D2'?

 

Thanks,

Arthur

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Athanasios
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Level 3
45 19 1 1
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I have solved my own problem.

 

I read the "HP Prime AP Statistics Summer Institute" pdf document and it expained how to use the    Satatistics 1Var app in greater detail.

 

Regards

Arthur

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