Essentials of Statistics for Business and Economics
9th Edition
ISBN: 9780357118191
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams
Publisher: Cengage Learning US
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Textbook Question
Chapter 4.2, Problem 17E
Refer to the KP&L sample points and sample point probabilities in Tables 4.2 and 4.3.
- a. The design stage (stage 1) will run over budget if it takes 4 months to complete. List the sample points in the
event the design stage is over budget. - b. What is the
probability that the design stage is over budget? - c. The construction stage (stage 2) will run over budget if it takes 8 months to complete. List the sample points in the event the construction stage is over budget.
- d. What is the probability that the construction stage is over budget?
- e. What is the probability that both stages are over budget?
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20 km, because
GISS
Worksheet 10
Jesse runs a small business selling and delivering mealie meal to the spaza shops.
He charges a fixed rate of R80, 00 for delivery and then R15, 50 for each packet of
mealle meal he delivers. The table below helps him to calculate what to charge
his customers.
10
20
30
40
50
Packets of mealie
meal (m)
Total costs in Rands
80
235
390
545
700
855
(c)
10.1.
Define the following terms:
10.1.1. Independent Variables
10.1.2. Dependent Variables
10.2.
10.3.
10.4.
10.5.
Determine the independent and dependent variables.
Are the variables in this scenario discrete or continuous values? Explain
What shape do you expect the graph to be? Why?
Draw a graph on the graph provided to represent the information in the
table above.
TOTAL COST OF PACKETS OF MEALIE MEAL
900
800
700
600
COST (R)
500
400
300
200
100
0
10
20
30
40
60
NUMBER OF PACKETS OF MEALIE MEAL
Let X be a random variable with support SX = {−3, 0.5, 3, −2.5, 3.5}. Part ofits probability mass function (PMF) is given bypX(−3) = 0.15, pX(−2.5) = 0.3, pX(3) = 0.2, pX(3.5) = 0.15.(a) Find pX(0.5).(b) Find the cumulative distribution function (CDF), FX(x), of X.1(c) Sketch the graph of FX(x).
Chapter 4 Solutions
Essentials of Statistics for Business and Economics
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 - Code Churn. Code Churn is a common metric used to...
Ch. 4.1 - Tri-State Smokers. A Gallup Poll of U.S. adults...Ch. 4.1 - A company that manufactures toothpaste is studying...Ch. 4.1 - Powerball Lottery. The Powerball lottery is played...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 - Fatal Collisions with a Fixed Object. The National...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 - Americans Using Facebook and LinkedIn. A 2018 Pew...Ch. 4.3 - 26. Information about mutual funds provided by...Ch. 4.3 - Social Media Use. A marketing firm would like to...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 - Living with Family. Consider the following example...Ch. 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 - Jamal Crawford of the National Basketball...Ch. 4.4 - Giving Up Electronics. A 2018 Pew Research Center...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 - Prostate Cancer Screening. According to a 2018...Ch. 4.5 - ParFore created a website to market golf equipment...Ch. 4.5 - Americans Without Health Insurance. The National...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 - According to the Open Doors Report, 9.5% of all...Ch. 4 - An oil company purchased an option on land in...Ch. 4 - The five most common words appearing in spam...Ch. 4 - Robs Market (RM) is a regional food store chain in...
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