The average time spent sleeping (in hours) for a group of medical residents at a hospital can be approximated by a normal distribution, as shown in the figure.
(a) What is the shortest time spent sleeping that would still place a resident in the top 5% of sleeping times?
(b) Between what two values does the middle 50% of the sleep times lie?
Sleeping Times of Medical Residents

Transcribed Image Text:

μ = 6.1 hours σ= 1.0 hour 3 456 789 Hours