a) What is the probability of selecting students whose IQ ranges between 110 and 127? b) If you will select students who have at least an 1Q of 128, how many students are they? c) If only the top 10 students from the group are selected, what would be the least IQ a student must have to be part of the top 10?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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3. The IQs of 100 students are normally distributed with a mean of 115 and a standard
deviation of 10.
a) What is the probability of selecting students whose IQ ranges between 110 and 127?
b) If you will select students who have at least an 1Q of 128, how many students are
they?
c) If only the top 10 students from the group are selected, what would be the least IQ a
student must have to be part of the top 10?
Transcribed Image Text:3. The IQs of 100 students are normally distributed with a mean of 115 and a standard deviation of 10. a) What is the probability of selecting students whose IQ ranges between 110 and 127? b) If you will select students who have at least an 1Q of 128, how many students are they? c) If only the top 10 students from the group are selected, what would be the least IQ a student must have to be part of the top 10?
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