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Help with statistics random variables?

After manufacture, computer disks are tested for errors. Let X be the number of errors detected on a randomly chosen disk. The following table presents values of the cumulative distribution function F(x) of X.

x F(x)

0 0.41

1 0.72

2 0.83

3 0.95

4 1.00

a) What is the probability that two or fewer errors are detected?

b) What is the probability that no errors are detected?

Update:

So what you're saying is P(x) = F(x)?

2 Answers

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  • 9 years ago
    Favourite answer

    CrazyAzn89 -

    a) What is the probability that two or fewer errors are detected?

    F(2) = 0.83

    b) What is the probability that no errors are detected?

    F(0) = 0.41

    Hope that helped

  • 9 years ago

    that's correct. P(x) = F(x). F(x) here is the cumulative probability density function.

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