The average age of doctors in a certain hospital is 48.0 years old with a standard deviation of 6.0 years. If 42 doctors are chosen at random for a committee, find the probability that the mean age of those doctors is between 46.5 and 51.2 years. (A) (B) (C) (D) .3526 .9471 .2967 .5945 (E) .6493
Added by Angela B.
Step 1
5 - 48}{\frac{6}{\sqrt{42}}} = -1.62 \) Upper bound: \( Z_{\text{upper}} = \frac{51.2 - 48}{\frac{6}{\sqrt{42}}} = 3.46 \) Show more…
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