4) Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 welds completed during that shift, what is the probability that he will find less than 20 substandard welds? A) 0.4066 C) 0.0934 B) 0.5934 D) 0.9066 5) The National Association of Realtors estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold in 2004 is obtained what is the probability that at most 200 homes are going to be used as investment property? A) 0.5935 C) 0.0934 B) 0.4066 D) 0.9099 6) According to data from the American Cancer Society, about 3.86% of women develop breast cancer between the ages of 40-59. What is the probability that in a random sample of 500 39-year-old women without breast cancer, more than 20 will develop breast cancer by the age of 59? A) 0.4353 C) 0.4305 B) 0.2340 D) 0.6350
4) Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 welds completed during that shift, what is the probability that he will find less than 20 substandard welds? A) 0.4066 C) 0.0934 B) 0.5934 D) 0.9066 5) The National Association of Realtors estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold in 2004 is obtained what is the probability that at most 200 homes are going to be used as investment property? A) 0.5935 C) 0.0934 B) 0.4066 D) 0.9099 6) According to data from the American Cancer Society, about 3.86% of women develop breast cancer between the ages of 40-59. What is the probability that in a random sample of 500 39-year-old women without breast cancer, more than 20 will develop breast cancer by the age of 59? A) 0.4353 C) 0.4305 B) 0.2340 D) 0.6350
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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Transcribed Image Text:4) Smith is a weld inspector at a shipyard. He
knows from keeping track of good and
substandard welds that for the afternoon shift
5% of all welds done will be substandard. If
Smith checks 300 welds completed during that
shift, what is the probability that he will find
less than 20 substandard welds?
A) 0.4066
C) 0.0934
B) 0.5934
D) 0.9066
5) The National Association of Realtors estimates
that 23% of all homes purchased in 2004 were
considered investment properties. If a sample of
800 homes sold in 2004 is obtained what is the
probability that at most 200 homes are going to
be used as investment property?
A) 0.5935
C) 0.0934
B) 0.4066
D) 0.9099
Transcribed Image Text:6) According to data from the American Cancer
Society, about 3.86% of women develop breast
cancer between the ages of 40-59. What is the
probability that in a random sample of 500
39-year-old women without breast cancer, more
than 20 will develop breast cancer by the age
of
59?
A) 0.4353
C) 0.4305
B) 0.2340
D) 0.6350
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