STATISTICS F/BUSINESS+ECONOMICS-TEXT
13th Edition
ISBN: 9781305881884
Author: Anderson
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 3, Problem 64SE
The average waiting time for a patient at an El Paso physician’s office is just over 29 minutes, well above the national average of 21 minutes. In fact, El Paso has the longest physician’s office waiting times in the United States (El Paso Times, January 8, 2012). In order to address the issue of long patient wait times, some physician’s offices are using wait tracking systems to notify patients of expected wait times. Patients can adjust their arrival times based on this information and spend less time in waiting rooms. The following data show wait times (minutes) for a sample of patients at offices that do not have an office tracking system and wait times for a sample of patients at offices with an office tracking system.
| Without Wait Tracking System | With Wait Tracking System |
| 24 | 31 |
| 67 | 11 |
| 17 | 14 |
| 20 | 18 |
| 31 | 12 |
| 44 | 37 |
| 12 | 9 |
| 23 | 13 |
| 16 | 12 |
| 37 | 15 |
- a. What are the
mean and median patient wait times for offices with a wait tracking system? What are the mean and median patient wait times for offices without a wait tracking system? - b. What are the variance and standard deviation of patient wait times for offices with a wait tracking system? What are the variance and standard deviation of patient wait times for visits to offices without a wait tracking system?
- c. Do offices with a wait tracking system have shorter patient wait times than offices without a wait tracking system? Explain.
- d. Considering only offices without a wait tracking system, what is the z-score for the tenth patient in the sample?
- e. Considering only offices with a wait tracking system, what is the z-score for the sixth patient in the sample? How does this z-score compare with the z-score you calculated for part (d)?
- f. Based on z-scores, do the data for offices without a wait tracking system contain any outliers? Based on z-scores, do the data for offices with a wait tracking system contain any outliers?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
In February 2021, the Chicago Tribune reported:“The overdose epidemic that has ravaged Chicago has not spared the nearby suburbs, some of which have death rates comparable to anything seen in the city, according to a report released this week by the Cook County Department of Public Health. ZIP codes in the towns of Worth, Broadview, Maywood, and Forest Park, areas that “have substantially lower median household incomes and higher poverty rates,” have been especially hard-hit, the report said.”In the article, they claimed that lower incomes were associated with higher overdose death rates and that overdose death rates are increasing over time. The data you have been analyzing wasn’t focused on Chicago, obviously. But do your results support the general gist of the statistical argument being made in this Tribune excerpt? Please address:• Do overdose death rates appear to be associated with per capita income (use scatterplot)?• Do overdose death rates appear to be increasing over time…
In May 2008, CNN reported that Sports Utility Vehicles (SUVs) are plunging toward the
"endangered list". Due to soaring oil prices and environmental concerns, consumers are
replacing gas-guzzling vehicles with fuel-efficientsmaller cars. As a result, there has been a
big drop in the demand for new as well as used SUVs. A sales manager of a used car
dealership for SUVs believes that it takes more than 90 days, on average, to sell an sUV. In
order to test his claim, he samples 40 recently sold SUVs and find that it took an average of 95
days to sell an SUV. He believes that the population standard deviation is fairly stable at 20
days. Determine if the sales manager's claim is justifiable at 0.05
According to the American Management Association, most U.S. companies now test at least some employees and job applicants for drug use. The U.S. National Institute on Drug Abuse claims that about 15% of people in the 18-25 age bracket use illegal drugs. Allyn Clark, a 21 year-old college graduate, applied for a job at the Acton Paper Company, took a drug test, and was not offered a job. He suspected that he might have failed the drug test, even though he does not use drugs. In checking with the company's personnel department, he found that the drug test has 99% sensitivity, which means that only 1% of drug users incorrectly test negative. Also, the test has 98% specificity, meaning that only 2% of nonusers are incorrectly identified as drug users. Allyn felt relieved by these figures because he believed that they reflected a very reliable test that usually provides good results. But is this really true?
The accompanying table shows data for Allyn and 1,499 other job applicants. Based…
Chapter 3 Solutions
STATISTICS F/BUSINESS+ECONOMICS-TEXT
Ch. 3.1 - Consider a sample with data values of 10, 20, 12,...Ch. 3.1 - Consider a sample with data values of 10, 20, 21,...Ch. 3.1 - Consider the following data and corresponding...Ch. 3.1 - Consider the following data. Period Rate of Return...Ch. 3.1 - Consider a sample with data values of 27, 25, 20,...Ch. 3.1 - Consider a sample with data values of 53, 55, 70,...Ch. 3.1 - The average number of minutes Americans commute to...Ch. 3.1 - The Wall Street Journal reported that the median...Ch. 3.1 - Which companies spend the most money on...Ch. 3.1 - Over a nine-month period, OutdoorGearLab tested...
Ch. 3.1 - According to the National Education Association...Ch. 3.1 - The Big Bang Theory, a situation comedy featuring...Ch. 3.1 - In automobile mileage and gasoline-consumption...Ch. 3.1 - The data contained in the file named StateUnemp...Ch. 3.1 - Martinez Auto Supplies has retail stores located...Ch. 3.1 - The grade point average for college students is...Ch. 3.1 - The following table shows the total return and the...Ch. 3.1 - Based on a survey of masters programs in business...Ch. 3.1 - Annual revenue for Corning Supplies grew by 5.5%...Ch. 3.1 - Suppose that at the beginning of 2004 you invested...Ch. 3.1 - If an asset declines in value from 5000 to 3500...Ch. 3.1 - The current value of a company is 25 million. If...Ch. 3.2 - Consider a sample with data values of 10, 20, 12,...Ch. 3.2 - Consider a sample with data values of 10, 20, 12,...Ch. 3.2 - Consider a sample with data values of 27, 25, 20,...Ch. 3.2 - Data collected by the Oil Price information...Ch. 3.2 - The results of a search to find the least...Ch. 3.2 - The Australian Open is the first of the four grand...Ch. 3.2 - The Los Angeles times regularly reports the air...Ch. 3.2 - The following data were used to construct the...Ch. 3.2 - The results of Accounting Principals latest...Ch. 3.2 - Advertising age annually compiles a list of the...Ch. 3.2 - Scores turned in by an amateur golfer at the...Ch. 3.2 - The following times were recorded by the...Ch. 3.3 - Consider a sample with data values of 10, 20, 12,...Ch. 3.3 - Consider a sample with a mean of 500 and a...Ch. 3.3 - Consider a sample with a mean of 30 and a standard...Ch. 3.3 - Suppose the data have a bell-shaped distribution...Ch. 3.3 - The results of a national survey showed that on...Ch. 3.3 - The energy information Administration reported...Ch. 3.3 - The Graduate Management Admission Test (GMAT) is a...Ch. 3.3 - Many families in California are using backyard...Ch. 3.3 - According to a Los Angeles Times study of more...Ch. 3.3 - A sample of 10 NCAA college basketball game scores...Ch. 3.3 - The Wall Street Journal reported that Walmart...Ch. 3.4 - Consider a sample with data values of 27, 25, 20,...Ch. 3.4 - Prob. 47ECh. 3.4 - Prob. 48ECh. 3.4 - A data set has a first quartile of 42 and a third...Ch. 3.4 - Naples, Florida, hosts a half-marathon (13.1-mile...Ch. 3.4 - Annual sales, in millions of dollars, for 21...Ch. 3.4 - Consumer Reports provided overall customer...Ch. 3.4 - Fortune magazines list of the worlds most admired...Ch. 3.4 - The Bureau of Transportation Statistics keeps...Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Ten major college football bowl games were played...Ch. 3.5 - A department of transportations study on driving...Ch. 3.5 - Over the past 40 years, the percentage of homes in...Ch. 3.5 - The Russell 1000 is a stock market index...Ch. 3.5 - A random sample of 30 colleges from Kiplingers...Ch. 3 - The average number of times Americans dine out in...Ch. 3 - USA Today reports that NCAA colleges and...Ch. 3 - The average waiting time for a patient at an El...Ch. 3 - U.S. companies lose 63.2 billion per year from...Ch. 3 - A study of smartphone users shows that 68% of...Ch. 3 - Public transportation and the automobile are two...Ch. 3 - In 2007 the New York Times reported that the...Ch. 3 - The data contained in the DATAfile named...Ch. 3 - Travel + Leisure magazine provides an annual list...Ch. 3 - The 32 teams in the National Football League (NFL)...Ch. 3 - Does a major league baseball teams record during...Ch. 3 - The days to maturity for a sample of five money...Ch. 3 - Automobiles traveling on a road with a posted...Ch. 3 - The Panama Railroad Company was established in...Ch. 3 - Pelican Stores Pelican Stores, a division of...Ch. 3 - Motion Picture Industry The motion picture...Ch. 3 - Business Schools of Asia-Pacific The pursuit of a...Ch. 3 - African Elephant Populations Although millions of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- It describes a scenario in which a math teacher named Matt allows his students to use a 1-page reference sheet during exams, and compares the effectiveness of this method to a colleague's method of providing a pre-made reference sheet for students.arrow_forwardDiscuss how companies in practice manage (1) actual waiting time AND (2) perceived waiting time by providing at least one example for each case.arrow_forwardYou are the marketing director for a company that manufactures bodybuilding supplements and you are planning to run ads in Sports Illustrated and GQ Magazine. Based on readership data, you estimate that each one-page ad in Sports Illustrated will be read by 670,000 people in your target group, while each one-page ad in GQ will be read by 170,000. You would like your ads to be read by at least 3 million people in the target group and, to ensure the broadest possible audience, you would like to place at least three full-page ads in each magazine. Draw the feasible region that shows how many pages you can purchase in each magazine. (Let x be the number of full-page ads in Sports Illustrated and let y be the number of full-page ads in GQ Magazine.) Find the corner points of the region. (Round each coordinate to the nearest whole number. If an answer does not exist, enter DNE.) smaller x-value(x, y) = larger x-value(x, y) =arrow_forward
- Kentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that the emission from the krypton smelter have resulted in adverse effects. Specifically, Kryptonosis seems to have killed 12 of Kentville’s inhabitants last year. A neighboring community, Lanesburg, has 25,000 inhabitants and is far enough from the smelter to not be affected by the emission. In Lanesburg, only three people last year died of Kryptonosis. Given that the number of deaths in Kentville and their causes last year were: Heart attack=7 Accidents=4 Kryptonosis=12 Other=6 What is the risk of dying of Kryptonosis in Kentville relative to non-contaminated locality?What is the risk of dying of Kryptonosis in Kentville relative to deaths due to other causes? How many times the chance of dying of Kryptonosis compared to dying of accidents ? How many times the chance of dying of Kryptonosis compared to Other causes?arrow_forwardAccording to an article by Hiroko Tabuchi and Michael Corkery, in the New York Times, “Exports of US plastic garbage rise, despite ban.” When more than 180 nations agreed last year to place strict limits on exports of plastic waste from richer countries to poorer ones, the move was seen as a major victory in the fight against plastic pollution. [But,] Data for January showed that exports of scrap plastic from the United States edged upward, to 48 million tons from 45 million tons the previous January. Exports to poorer nations were virtually unchanged from a year ago, totaling 25 million tons. Advocates say that there are clear red flags in the data. Malaysia, which had signed on [to the agreement], remained a major destination for US scrap plastic in January. a. How many pounds did each American contribute on average to the amount of scrap plastic exported from the USA to poorer nations like Malaysia in 2020? Type your work and answer here: b. What was the percent (%) increase in…arrow_forwardFaschip, Ltd., is a new African manufacturer of notebook computers. Their quality target is that 99.999% of the computers they produce will perform exactly as promised in the descriptive literature. In order to monitor their quality performance they include with each computer a large piece of paper that includes a direct—toll-free—phone number to the Senior Vice President of Manufacturing that can be used if the computer does not perform as promised. In the first year Faschip sells 1,000,000 computers.a. If they are achieving their quality target, what is the probability that they will receive fewer than 5 calls? If this occurs what would be a reasonable conclusion about their quality program? b. If they are achieving their quality target, what is the probability that they will receive more than 15 calls? If this occurs, what would be a reasonable conclusion about their quality program?arrow_forward
- Create a boxplot for patient wait time for offices without a wait-tracking systemarrow_forwardGiven that there are more women in the labor force, more women holding advanced degrees, how does the glass ceiling and the second shift contribute to the persistence of gender inequality?arrow_forwardthe internal revenue Service (irS) provides a toll-free help line for taxpayers to call inand get answers to questions as they prepare their tax returns. in recent years, the irShas been inundated with taxpayer calls and has redesigned its phone service as well asposted answers to frequently asked questions on its website (the Cincinnati Enquirer,January 7, 2010). according to a report by a taxpayer advocate, callers using the newsystem can expect to wait on hold for an unreasonably long time of 12 minutes beforebeing able to talk to an irS employee. Suppose you select a sample of 50 callers afterthe new phone service has been implemented; the sample results show a mean waitingtime of 10 minutes before an irS employee comes on the line. based upon data from pastyears, you decide it is reasonable to assume that the standard deviation of waiting timeis 8 minutes. using your sample results, can you conclude that the actual mean waitingtime turned out to be significantly less than the…arrow_forward
- A recent survey points to the transformation underway in the automotive retail landscape. A study found that automobile executives believe the number of physical automotive retail outlets, as we know them today, will be reduced by 30% to 50%. Eighty-two percent of automobile executives strongly agree that the only viable option for physical retail outlets will be the transformation into service factories, used car hubs, or focusing on an ID-management approach, where the customer is recognized at every single touchpoint. What additional information would you want to know about the survey before you accepted the results of the study?arrow_forwardThe vintage Restaurant is located on Captiva Island, a resort community located near Fort Meyers, Florida. The restaurant, which is owned and operated by Karen Payne, has just completed its third year of operation. During this time, Karen sought to establish a reputation for the restaurant as a high-quality dining establishment that specializes in fresh seafood. The efforts made by Karen and her staff have proved successful, and her restaurant has become one of the best and fastest-growing restaurants on the island. Karen has just concluded that to plan better for the growth of the restaurant in the future, it is necessary to develop a system that will enable her to forecast food and beverage sales by the month for up to 1 year in advance. Karen has the following data available on the total food and beverage sales that were realized during the previous 3 years of operation. Food and Beverage Sales for the Vintage Restaurant ($1000s) Month First Year Second Year Third YearJanuary 242…arrow_forwardTo the Internal Revenue Service, the reasonableness of total itemized deductions depends on the taxpayer's adjusted gross income. Large deductions, which include charity and medical deductions, are more reasonable for taxpayers with large adjusted gross incomes. If a taxpayer claims larger than average itemized deductions for a given level of income, the chances of an IRS audit are increased. Data (in thousands of dollars) on adjusted gross income and the average or reasonable amount of itemized deductions follow. Adjusted Gross Income($1,000s) Itemized Deductions($1,000s) 22 9.6 27 9.6 32 10.1 48 11.1 65 11.5 85 19.7 120 23.5 (a) Develop a scatter diagram for these data with adjusted gross income as the independent variable. A scatter diagram has 7 points plotted on it. The horizontal axis ranges from 0 to 140 and is labeled: Adjusted Gross Income ($1,000s). The vertical axis ranges from 0 to 30 and is labeled: Itemized Deductions ($1,000s). The points are…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Mod-01 Lec-01 Discrete probability distributions (Part 1); Author: nptelhrd;https://www.youtube.com/watch?v=6x1pL9Yov1k;License: Standard YouTube License, CC-BY
Discrete Probability Distributions; Author: Learn Something;https://www.youtube.com/watch?v=m9U4UelWLFs;License: Standard YouTube License, CC-BY
Probability Distribution Functions (PMF, PDF, CDF); Author: zedstatistics;https://www.youtube.com/watch?v=YXLVjCKVP7U;License: Standard YouTube License, CC-BY
Discrete Distributions: Binomial, Poisson and Hypergeometric | Statistics for Data Science; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=lHhyy4JMigg;License: Standard Youtube License