a) Find the probability that 1 randomly selected adult male has a weight greater than 148 lb. Type your answer... b) Find the probability that 27 randomly selected adult males have a mean weight greater than 148 lb. 号
a) Find the probability that 1 randomly selected adult male has a weight greater than 148 lb. Type your answer... b) Find the probability that 27 randomly selected adult males have a mean weight greater than 148 lb. 号
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Question

Transcribed Image Text:2. An elevator has a sign indicating "Maximum
Capacity 2000 lb -- 27 passengers." Because 4000/27
=
148, this corresponds to a mean passenger weight of
148 lb when the elevator is full. Assume the worst
case scenario of 27 adult males. Assume the weight of
adult males is normally distributed with a mean of 189
lb and a standard deviation of 39 lb.
a) Find the probability that 1 randomly selected adult
male has a weight greater than 148 lb.
Type your answer...
-DI
b) Find the probability that 27 randomly selected adult
males have a mean weight greater than 148 lb.
Type your answer...
--DO
c) Elevators typically have a safety factor of 25%. So
an elevator rated for 4000 lb, can actually carry a
capacity of 5000 lb. Using this value, at 27 male
passengers, the allowed average weight is 185.2 lb.
What is the probability that the elevator is overloaded
when 27 males are onboard?
Type your answer.
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