Advanced Placement (AP)

Let random variable X represent the number of movies screening at movie theaters in a certain city. The following table shows the cumulative probability distribution of the discrete random variable X. x P(X≤x)
1 0.2
2 0.5
3 0.6
4 0.7
5 0.8
6 0.9
7 1.0
Andromeda claims the distribution of X is skewed to the right with mean equal to 4 movies. Is Andromeda’s claim supported by the table?

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Let random variable X represent the number of movies screening at movie theaters in a certain city....

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