Of the one million squirrels on HU’s main campus most are good-natured. But one hundred of them are pure evil! An enterprising student of FEST develops an “Evil Squirrel Alarm” which he/she offers to sell to HU for a passing grade. HU decides to test the reliability of the alarm by conducting trials.  When presented with an evil squirrel, the alarm goes off 99% of the time.  When presented with a good-natured squirrel, the alarm goes off 1% of the time. (a) If a squirrel sets off the alarm, what is the probability that it is evil? (b) Should HU employ the system?

Of the one million squirrels on HU’s main campus most are good-natured. But one hundred of them are pure evil! An enterprising student of FEST develops an “Evil Squirrel Alarm” which he/she offers to sell to HU for a passing grade. HU decides to test the reliability of the alarm by conducting trials.  When presented with an evil squirrel, the alarm goes off 99% of the time.  When presented with a good-natured squirrel, the alarm goes off 1% of the time. (a) If a squirrel sets off the alarm, what is the probability that it is evil? (b) Should HU employ the system?

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Description: Of the one million squirrels on HU’s main campus most are good-natured. But onehundred of them are pure evil! An enterprising student of FEST develops an “EvilSquirrel Alarm” which he/she offers to sell to HU for a passing grade. HU decides totest th

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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Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Of the one million squirrels on HU’s main campus most are good-natured. But one
hundred of them are pure evil! An enterprising student of FEST develops an “Evil
Squirrel Alarm” which he/she offers to sell to HU for a passing grade. HU decides to
test the reliability of the alarm by conducting trials.
 When presented with an evil squirrel, the alarm goes off 99% of the time.
 When presented with a good-natured squirrel, the alarm goes off 1% of the
time.
(a) If a squirrel sets off the alarm, what is the probability that it is evil?
(b) Should HU employ the system?

Video Video

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