SOLUTION: Fidelity records the number of X-Trails sold each day. This data is used in calculating the following probability distribution of daily sales: x P(x)

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Question 1164152: Fidelity records the number of X-Trails sold each day. This data is used in calculating the following probability distribution of daily sales:
x P(x)
0 0.1
1 0.1
2 0.2
3 0.2
4 0.3
5 0.1
1) Find the cumulative distribution function (CDF)
Some help would be greatly appreciated, thanks!
Answer by Edwin McCravy(20063)   (Show Source): You can put this solution on YOUR website!
Fidelity records the number of X-Trails sold each day. This data is used in calculating the following probability distribution of daily sales:
1) Find the cumulative distribution function (CDF)
Some help would be greatly appreciated, thanks!
The word "cumulative" reminds you of 'accumulating', so you 'accumulate'
the P(x)'s as you go, by adding all the previous values to each one.

                x       P(x)   CDP(x)
                0       0.1    0.1 = 0.1                
                1       0.1    0.1+0.1 = 0.2
                2       0.2    0.1+0.1+0.2 = 0.4
                3       0.2    0.1+0.1+0.2+0.2 = 0.6
                4       0.3    0.1+0.1+0.2+0.2+0.3 = 0.9
                5       0.1    0.1+0.1+0.2+0.2+0.3+0.1 = 1.0

Edwin
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