The vending machine problem Have you ever purchased a hot drink from a vend- ing machine? The intended sequence of events runs something like this. You insert your money into the machine and select your preferred beverage. A cup falls out of the machine, landing upright. Liquid pours out until the cup is nearly full. You reach in, grab the piping hot cup, and drink happily. Sometimes, things go wrong. The machine might take your money and not give you anything in return. Or the cup might fall over. More fre- quently, everything goes smoothly until the liquid begins to flow. It might stop flowing when the cup is only half full. Or the liquid might keep coming until your cup overflows. Neither of these results leaves you satisfied. The vending machine company wants to keep customers happy. So they have decided to hire you as a statistical consultant. They provide you with the following summary of important facts about the vending machine: Cups will hold 8 ounces. The amount of liquid dispensed varies according to a Normal distribution centered at the mean that is set in the machine. .σ= 0.2 ounces • QUESTIONS 1. Suppose the company sets the machine's mean at μ = 7.5 ounces. What percent of cups would overflow? Show your work.
The vending machine problem Have you ever purchased a hot drink from a vend- ing machine? The intended sequence of events runs something like this. You insert your money into the machine and select your preferred beverage. A cup falls out of the machine, landing upright. Liquid pours out until the cup is nearly full. You reach in, grab the piping hot cup, and drink happily. Sometimes, things go wrong. The machine might take your money and not give you anything in return. Or the cup might fall over. More fre- quently, everything goes smoothly until the liquid begins to flow. It might stop flowing when the cup is only half full. Or the liquid might keep coming until your cup overflows. Neither of these results leaves you satisfied. The vending machine company wants to keep customers happy. So they have decided to hire you as a statistical consultant. They provide you with the following summary of important facts about the vending machine: Cups will hold 8 ounces. The amount of liquid dispensed varies according to a Normal distribution centered at the mean that is set in the machine. .σ= 0.2 ounces • QUESTIONS 1. Suppose the company sets the machine's mean at μ = 7.5 ounces. What percent of cups would overflow? Show your work.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 9E
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I want the answers for those 4 questions with graph
Transcribed Image Text:10
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The vending machine problem
Have you ever purchased a hot drink from a vend-
ing machine? The intended sequence of events runs
something like this. You insert your money into the
machine and select your preferred beverage. A cup
falls out of the machine, landing upright. Liquid
pours out until the cup is nearly full. You reach in,
grab the piping hot cup, and drink happily.
Sometimes, things go wrong. The machine
might take
take your money and not give you anything
in return. Or the cup might fall over. More fre-
quently, everything goes smoothly until the liquid
begins to flow. It might stop flowing when the cup
is only half full. Or the liquid might keep coming
until your cup overflows. Neither of these results
leaves you satisfied.
2. If a cup contains too much liquid, a customer may get
burned from a spill. This could result in an expensive
lawsuit for the company. Explain to the company
president why setting the machine's mean at 7.0 ounces
might be smarter than setting it at 7.5 ounces.
3. Customers may be irritated if they get a cup with
too little liquid from the machine. At what value
APPLICATION 3.2
Reas Des
The vending machine company wants to keep
customers happy. So they have decided to hire you
as a statistical consultant. They provide you with
the following summary of important facts about the
vending machine:
• Cups will hold 8 ounces.
•The amount of liquid dispensed varies
according to a Normal distribution centered at
the mean that is set in the machine.
O = 0.2 ounces
1
QUESTIONS
1. Suppose the company sets the machine's mean
at μ
= 7.5 ounces. What percent of cups would
overflow? Show your work.
LG
3.2 Normal Distributions
should the machine's mean be set to ensure that
90% of cups contain at least 7 ounces?
135
4. Given the issues raised in the previous two
questions, what mean setting for the machine
you recommend? Write a brief report to the
would
vending machine company president that explains
your answer.
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