Business Statistics: A First Course (8th Edition)
8th Edition
ISBN: 9780135177785
Author: David M. Levine, Kathryn A. Szabat, David F. Stephan
Publisher: PEARSON
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Chapter 2, Problem 2.82CYU
To determine
To find:The reason that it is said the main feature of a Pareto chart is its ability to separate the “vital few” from the “trivial many”.
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28. Vehicle Costs The average owning and operating costs for
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A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Illinois and Massachusetts. Due to recent trends in the
childcare industry, the firm suspects that the that the mean annual income of childcare workers in the state of Illinois is greater than the mean annual
income of childcare workers in Massachusetts. To see if this is true, the firm selected a random sample of 15 childcare workers from Illinois and an
independent random sample of 15 childcare workers from Massachusetts and asked them to report their mean annual income. The data obtained were as
follows.
圖
Annual income in dollars
an
Illinois
45985, 37240, 46895, 45091, 41853, 45138, 53463, 51655, 47796, 51058, 40233, 49095, 40394, 39905, 49575
Massachusetts 38439, 42441, 43968, 53645, 41006, 46629, 49825, 47119, 37071, 37348, 40204, 49762, 39894, 47038, 41879
Send data to calculator
The population standard deviations for the annual incomes of childcare workers in Illinois and in…
Chapter 2 Solutions
Business Statistics: A First Course (8th Edition)
Ch. 2 - Prob. 2.1LBCh. 2 - The following data represent the responses to two...Ch. 2 - Prob. 2.3ACCh. 2 - Prob. 2.5ACCh. 2 - Prob. 2.6ACCh. 2 - Prob. 2.7ACCh. 2 - Prob. 2.8ACCh. 2 - Prob. 2.10ACCh. 2 - Prob. 2.11LBCh. 2 - Prob. 2.12LB
Ch. 2 - Prob. 2.14LBCh. 2 - The file UTILITY contains the following data about...Ch. 2 - One operation of a mill to cut pieces of steel...Ch. 2 - Prob. 2.21ACCh. 2 - Prob. 2.23ACCh. 2 - Prob. 2.25ACCh. 2 - Prob. 2.26ACCh. 2 - The following table indicates the percentage of...Ch. 2 - Prob. 2.29ACCh. 2 - Prob. 2.30ACCh. 2 - Prob. 2.31ACCh. 2 - Prob. 2.32ACCh. 2 - Prob. 2.33LBCh. 2 - Prob. 2.34LBCh. 2 - Prob. 2.35ACCh. 2 - The file UTILITY contains the following data about...Ch. 2 - Prob. 2.39ACCh. 2 - Prob. 2.43ACCh. 2 - The data stored in DRINK represents the amount of...Ch. 2 - Prob. 2.48LBCh. 2 - Prob. 2.49LBCh. 2 - Prob. 2.50ACCh. 2 - Data were collected on the typical cost of dining...Ch. 2 - Prob. 2.53ACCh. 2 - Prob. 2.54ACCh. 2 - Prob. 2.55ACCh. 2 - Prob. 2.56ACCh. 2 - Using the sample of retirement funds stored in...Ch. 2 - Prob. 2.59ACCh. 2 - Using the sample of retirement funds stored in...Ch. 2 - Using the sample of retirement funds stored in...Ch. 2 - Prob. 2.62ACCh. 2 - Prob. 2.70ACCh. 2 - Prob. 2.71ACCh. 2 - Prob. 2.72ACCh. 2 - Prob. 2.73ACCh. 2 - Prob. 2.75ACCh. 2 - Prob. 2.76ACCh. 2 - Prob. 2.77CYUCh. 2 - Prob. 2.78CYUCh. 2 - What are the advantages and disadvantages of using...Ch. 2 - Compare and contrast the bar chart for categorical...Ch. 2 - Prob. 2.81CYUCh. 2 - Prob. 2.82CYUCh. 2 - What are the three different ways to break down...Ch. 2 - How can a multidimensional table differ from a...Ch. 2 - Prob. 2.85CYUCh. 2 - Prob. 2.89CRPCh. 2 - The owner of a restaurant that serves...Ch. 2 - Suppose that the owner of the restaurant in...Ch. 2 - Prob. 2.94CRPCh. 2 - One of the major measures of the quality of...Ch. 2 - Prob. 2.103CRPCh. 2 - Prob. 2.104CRPCh. 2 - Prob. 2.105CRPCh. 2 - Prob. 2.109RWE
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- Gap, Banana Republic, J. Crew, Yahoo, and America Online are just a few of the many companies interested in knowing the percentage of adults who buy clothing online. How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points? Use this recent result from the Census Bureau: 66% of adults buy clothing online.arrow_forwardA recent survey asked "What is your favorite vacation type or destination? I got this question wrong because I don't know how to make a pareto chart.arrow_forwardA researcher wished to gauge public opinion on gun control. He randomly selected 1000people from among registered voters and asked them the following question: "Do you believe that gun control laws which restrict the abilities of Americans to protect their families should be eliminated?" Identify the abuse of statistics and suggest a way the researcher's methods could be improved.arrow_forward
- A reporter writing for a national newspaper claimed that representatives of school districts were falsely reporting their students’ performance on standardized tests. Over 90% of the nation’s school districts report that their students are performing above the national average, and the reporter claimed that isn’t possible. It is possible. a) Provide a list of 10 numbers for which 90% are above the mean. b) What can you infer about the nation’s school districts if 90% of them really are performing above the national average?arrow_forwardcentral airlines claims that the median price of a round-trip ticket from chicago, illinois, to jackson hole, wynomimg is $606. this claim is being challenged by the association of travel agents, who believe the median price is less than $606. a random sample of 25 round-trip tickets from chicago to jackson hole revealed 11 tickets were below $606. none of the tickets was exaclty $606. what is the p-value?arrow_forwardStudents in a statistics class were asked, “About how many minutes do you typically exercise in aweek?” Responses from the men in the class were “180, 300, 60, 480, 0, 90, 300, 14, 600, 360, 120, 0,240”(a) Create a five-number summary of the men’s responses.(b) Identify any potential outliers.arrow_forward
- Please help with (D)arrow_forwardA company's data science team is having trouble with their analysis due to errors in data entry. When details about the production process are being coded into the database, the frequency of the errors made are identified and are presented in this Pareto chart according to error sources. If this company wants to deal with this situation and get rid of 80% of the errors, which error sources should they eliminate? Pareto Chart for CodingErrors O A. Color, Contact num., Material type O B. Color, Contact num., Material type, Part num., Supplier code O C. Color, Material type, Part num., Supplier code O D. Color, Contact num., Material type, Part num. kouənbəl 0 100 200 300 400 009 009 contact num. material type part num. supplier code schedule date price code %09 80% 100% %07 Cumulative Percentage %0arrow_forwardA nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Texas and Virginia. Due to recent trends in the childcare industry, the firm suspects that the mean annual income of childcare workers in Texas is less than the mean annual income of childcare workers in Virginia. To see if this is true, the firm selected a random sample of 10 childcare workers from Texas and an independent random sample of 10 childcare workers from Virginia and asked them to report their mean annual income. The data obtained were as follows. Annual income in dollars Texas 32653, 40135, 41586, 29796, 26989, 28723, 42380, 27583, 28696, 36255 Virginia 42155, 37776, 39846, 39844, 40972, 41769, 46045, 41387, 37035, 41268 Send data to calculator Send data to Excel The population standard deviation for the annual incomes of childcare workers in Texas and in Virginia are estimated as 6100 and 6300, respectively. It is also known that both populations are approximately normally…arrow_forward
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