determining the cumulative probability distribution

Question

Complete the table below by determining the cumulative probability distribution:

x P(x) cdf

0 0.196

1 0.24

2 0.245

3 0.181

4 0.138

Answer 1

You need to know the definition of the CDF

x P(X=x) cdf: P(X≤x)

0 0.196 P(X≤0) = 0.196

1 0.24 P(X≤1) = 0.196 + .24 = .436

2 0.245 P(X≤2) = 0.436 + .245 = .681

3 0.181

4 0.138

You should be able to complete the rest of the table.

Assuming that all possibilities for x are listed, the final P(X≤4) must be equal to 1. This is always a good check that you've added everything correctly .