The Average Age of Doctors in a Certain Hospital Is

question 77

Multiple Choice

The average age of doctors in a certain hospital is 45.0 years old. Suppose the distribution of ages is normal and has a standard deviation of 4.0 years. If 16 doctors are chosen at random for a committee, find the probability that the average age of those doctors is less than 45.5 years. Assume that the variable is normally distributed.

• A) 19.1%
• B) 30.9%
• C) 61.2%
• D) 69.1%

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