Introduction to Business Statistics
7th Edition
ISBN: 9781111792374
Author: WEIERS
Publisher: Cengage Learning
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Chapter 1.3, Problem 1.4E
In 2008, Piedmont Natural Gas Corporation sold 50.4 million cubic feet of gas to residential customers, an increase of 3.7% over the previous year. Does this information represent
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1. Let 2 (a, b, c)} be the sample space.
(a) Write down the power set of 2.
(b) Construct a σ-field containing A = {a, b} and B = {b, c}.
(c) Show that F= {0, 2, {a, b}, {b, c}, {b}} is not a σ-field. Add some elements
to make it a σ-field..
13. Let (, F, P) be a probability space and X a function from 2 to R. Explain when
X is a random variable.
24. A factory produces items from two machines: Machine A and Machine B. Machine
A produces 60% of the total items, while Machine B produces 40%. The probability
that an item produced by Machine A is defective is P(DIA)=0.03. The probability
that an item produced by Machine B is defective is P(D|B)=0.05.
(a) What is the probability that a randomly selected product be defective, P(D)?
(b) If a randomly selected item from the production line is defective, calculate the
probability that it was produced by Machine A, P(A|D).
Chapter 1 Solutions
Introduction to Business Statistics
Ch. 1.2 - What was the primary use of statistics in ancient...Ch. 1.2 - what ways can business statistics be useful in...Ch. 1.3 - What is the difference between descriptive...Ch. 1.3 - In 2008, Piedmont Natural Gas Corporation sold...Ch. 1.3 - An article in a fitness magazine described a study...Ch. 1.4 - What is the difference between a qualitative...Ch. 1.4 - What is the difference between discrete and...Ch. 1.4 - The Acme School of Locksmithing has been...Ch. 1.4 - Jeff Rowlen, a labor relations expert, has...Ch. 1.4 - The Snowbird Ski Lodge attracts skiers from...
Ch. 1.5 - Restaurants sometimes provide “customer reaction”...Ch. 1.5 - What kinds of statistical data might a burglar...Ch. 1.6 - The text claims that a company or organization...Ch. 1.6 - The headline of an article in your daily newspaper...Ch. 1 - A research firm observes that men are twice as...Ch. 1 - For each of the following, indicate whether the...Ch. 1 - What kinds of statistical data play a role in an...Ch. 1 - For each of the following, indicate the scale of...Ch. 1 - Most undergraduate business students will not go...Ch. 1 - Bill scored 1200 on the Scholastic Aptitude Test...Ch. 1 - Roger Amster teaches an English course in which 40...Ch. 1 - In studying the performance of the company’s stock...
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