Essentials of Statistics for Business and Economics, Loose-leaf Version
8th Edition
ISBN: 9781337114196
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
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Textbook Question
Chapter 4, Problem 57SE
A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant. Historical records show that 6% of the employees suffered lost-time accidents last year. Management believes that a special safety program will reduce such accidents to 5% during the current year. In addition, it estimates that 15% of employees who had lost-time accidents last year will experience a lost-time accident during the current year.
- a. What percentage of the employees will experience lost-time accidents in both years?
- b. What percentage of the employees will suffer at least one lost-time accident over the two-year period?
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Theorem 1.2 (1) Suppose that P(|X|≤b) = 1 for some b > 0, that EX = 0, and
set Var X = 0². Then, for 0 0,
P(X > x) ≤e-x+1²²
P(|X|>x) ≤2e-1x+1²²
(ii) Let X1, X2...., Xn be independent random variables with mean 0, suppose
that P(X ≤b) = 1 for all k, and set oσ = Var X. Then, for
x > 0.
and
0x) ≤2 exp
Σ
k=1
(iii) If, in addition, X1, X2, X, are identically distributed, then
P(S|x) ≤2 expl-tx+nt²o).
Theorem 5.1 (Jensen's inequality)
state without proof the Jensen's Ineg.
Let X be a random variable, g a convex function, and suppose that X and g(X) are
integrable. Then
g(EX) < Eg(X).
Can social media mistakes hurt your chances of finding a job? According to a survey of 1,000 hiring managers across many different industries, 76% claim that they use social media sites to research prospective candidates for any job. Calculate the probabilities of the following events. (Round your answers to three decimal places.) answer parts a-c. a) Out of 30 job listings, at least 19 will conduct social media screening. b) Out of 30 job listings, fewer than 17 will conduct social media screening. c) Out of 30 job listings, exactly between 19 and 22 (including 19 and 22) will conduct social media screening. show all steps for probabilities please. answer parts a-c.
Chapter 4 Solutions
Essentials of Statistics for Business and Economics, Loose-leaf Version
Ch. 4.1 - 1. An experiment has three steps with three...Ch. 4.1 - 2. How many ways can three items be selected from...Ch. 4.1 - How many permutations of three items can be...Ch. 4.1 - 4. Consider the experiment of tossing a coin three...Ch. 4.1 - 5. Suppose an experiment has five equally likely...Ch. 4.1 - An experiment with three outcomes has been...Ch. 4.1 - A decision maker subjectively assigned the...Ch. 4.1 - In the city of Milford, applications for zoning...Ch. 4.1 - Simple random sampling uses a sample of size n...Ch. 4.1 - Prob. 10E
Ch. 4.1 - The National Occupant Protection Use Survey...Ch. 4.1 - 12. The Powerball lottery is played twice each...Ch. 4.1 - A company that manufactures toothpaste is studying...Ch. 4.2 - An experiment has four equally likely outcomes:...Ch. 4.2 - 15. Consider the experiment of selecting a playing...Ch. 4.2 - Consider the experiment of rolling a pair of dice....Ch. 4.2 - Refer to the KPL sample points and sample point...Ch. 4.2 - 18. Fortune magazine publishes an annual list of...Ch. 4.2 - 19. Do you think global warming will have an...Ch. 4.2 - Junior Achievement USA and the Allstate Foundation...Ch. 4.2 - 21. Data on U.S. work-related fatalities by cause...Ch. 4.3 - Suppose that we have a sample space with five...Ch. 4.3 - 23. Suppose that we have a sample space S = {E1,...Ch. 4.3 - Clarkson University surveyed alumni to learn more...Ch. 4.3 - 25. The Eco Pulse survey from the marketing...Ch. 4.3 - 26. Information about mutual funds provided by...Ch. 4.3 - 27. What NCAA college basketball conferences have...Ch. 4.3 - A survey of magazine subscribers showed that 45.8%...Ch. 4.3 - High school seniors with strong academic records...Ch. 4.4 - 30. Suppose that we have two events, A and B, with...Ch. 4.4 - 31. Assume that we have two events, A and B, that...Ch. 4.4 - Prob. 32ECh. 4.4 - 33. Students taking the Graduate Management...Ch. 4.4 - The bureau of Transportation Statistics reports...Ch. 4.4 - 35. To better understand how husbands and wives...Ch. 4.4 - 36. Jamal Crawford of the National Basketball...Ch. 4.4 - 37. A joint survey by Parade magazine and Yahoo!...Ch. 4.4 - The Institute for Higher Education Policy, a...Ch. 4.5 - The prior probabilities for events A1 and A2 are...Ch. 4.5 - 40. The prior probabilities for events A1, A2, and...Ch. 4.5 - 41. A consulting firm submitted a bid for a large...Ch. 4.5 - A local bank reviewed its credit card policy with...Ch. 4.5 - 43. In August 2012, tropical storm Isaac formed in...Ch. 4.5 - ParFore created a website to market golf equipment...Ch. 4.5 - 45. The percentage of adult users of the Internet...Ch. 4 - A survey of adults aged 18 and older conducted by...Ch. 4 - 47. A financial manager made two new...Ch. 4 - 48. Forty-three percent of Americans use social...Ch. 4 - A study of 31,000 hospital admissions in New York...Ch. 4 - 50. A telephone survey to determine viewer...Ch. 4 - The U.S. Census Bureau serves as the leading...Ch. 4 - An MBA new-matriculants survey provided the...Ch. 4 - 53. Refer again to the data from the MBA...Ch. 4 - 54. In February 2012, the Pew Internet & American...Ch. 4 - 55. A large consumer goods company ran a...Ch. 4 - 56. Cooper Realty is a small real estate company...Ch. 4 - A company studied the number of lost-time...Ch. 4 - 58. According to the Open Doors Report, 9.5% of...Ch. 4 - An oil company purchased an option on land in...Ch. 4 - The five most common words appearing in spam...
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