67% of Americans feel secret files are being kept on them (based on data from The...
67% of Americans feel secret files are being kept on them (based on data from The Harper’s In-dex). Out of 25 randomly selected Americans, what is the probability 18 or more will feel secret files are being kept on them?
Homework Answers
X ~ B ( n = 25 , P = 0.67 )
P(X = 18 ) = 0.1516
P(X = 19 ) = 0.1134
P(X = 20 ) = 0.0691
P(X = 21 ) = 0.0334
P(X = 22 ) = 0.0123
P(X = 23 ) = 0.0033
P(X = 24 ) = 0.0006
P(X = 25 ) = 0
P ( X >= 18 ) = 0.3837
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