Statistics Solutions

(Steps Shown) Suppose that computer literacy among people ages 40 and older is being studied and that the accompanying tables describes the probability

Question: Suppose that computer literacy among people ages 40 and older is being studied and that the accompanying tables describes the probability distribution for four randomly selected people, where \(\mathbf{x}\) is the number that are computer literate. Find mean and standard deviation of this distribution. Is it unusual to find four computer literates among four randomly selected people? (Consider a score to be unusual if its \(\mathbf{Z}\) score is less than \(\mathbf{- 2}\) or greater than \(\mathbf{2}\) ).

X P(X)
0 0.16
1 0.25
2 0.36
3 0.15
4 0.08

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