4. Manhole covers must be a minimum of 22 in. in diameter, but can be as much as 60 in. in diameter. Assume that a manhole is constructed to have a circular opening with a diameter of 22 in. Men have shoulder widths that are normally distributed with a mean of 18.2 in. and a standard deviation of 1.0 in. a) What percentage of men will fit into the manhole? Type your answer... -DO b) Assume 36 men are selected at random, what is the probability that their mean shoulder breadth is less than 18.5 in.? Type your answer...

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter34: Customary Micrometers
Section: Chapter Questions
Problem 58A
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4. Manhole covers must be a minimum of 22 in. in
diameter, but can be as much as 60 in. in diameter.
Assume that a manhole is constructed to have a
circular opening with a diameter of 22 in. Men have
shoulder widths that are normally distributed with a
mean of 18.2 in. and a standard deviation of 1.0 in.
a) What percentage of men will fit into the manhole?
Type your answer...
D
b) Assume 36 men are selected at random, what is the
probability that their mean shoulder breadth is less
than 18.5 in.?
Type your answer...
Transcribed Image Text:4. Manhole covers must be a minimum of 22 in. in diameter, but can be as much as 60 in. in diameter. Assume that a manhole is constructed to have a circular opening with a diameter of 22 in. Men have shoulder widths that are normally distributed with a mean of 18.2 in. and a standard deviation of 1.0 in. a) What percentage of men will fit into the manhole? Type your answer... D b) Assume 36 men are selected at random, what is the probability that their mean shoulder breadth is less than 18.5 in.? Type your answer...
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