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In a given year, 24% of the people in a community use the emergency room at...

In a given year, 24% of the people in a community use the emergency room at the local hospital. A random sample of 26 people is selected.   

A researcher wishes to know the probability that a fixed number of individuals in the sample will have used the emergency room in the last year.


     a)  Find the probability that in a sample of 26, exactly 12 people used
the emergency room.

    b) Find the probability that in a sample of 26, 12 or fewer people used
the emergency room.

math   Statistics-And-Probability   
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Answer #1

Page that have lesed emergency X = no. persons Hoom x ~ B( 26, 0.24) a) P(x = 12)= Cs) (0.24) (1-0.24) 26-12 0.00756 12 26 -

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