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Problem: In a study of families with children with disabilities, groups of 6 US households were randomly selected. In the table below, the random variable x represents the number of households among 6 that had a child with a disability living there.
x P(x)
0 0.02
1 0.15
2 0.29
3 0.31
4 0.21
5 0.02
a) Is this a probability distribution?
b) What is the mean?
c) What is the standard deviation?
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