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Important information about Statistics - Normal Distribution

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The average length of stay in a chronic disease hospital for a certain type of patient is 60 days with a standard deviation of 15. Suppose it is reasonable to assume an approximately normal distribution of legths of stay.

a) What percentage of patients stay less than 50 days?

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The percentage of patients stay less than 50 days is found. A Complete, Neat and Step-by-step Solution is provided.

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Mean = 60, SD = 15

(a) X = 50, then z = (X ?Mean)/SD = (50 ?60)/15 = -10/15 = -0.67.

Probability that a person stays less than 50 ...

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