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?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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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?
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