New Semester Started Get 50% OFF Study Help! --h --m --s Claim Now

Question Answers

Textbooks

Find textbooks, questions and answers

Oops, something went wrong!

Change your search query and then try again

Result Not Found

Books FREE
Study Help
Tutors
AI Study Planner NEW
Sell Books

Search
Sign In
Register

study help
business
business statistics communicating

Basic Business Statistics Concepts And Applications 13th Global Edition Mark Berenson, David Levine, Kathryn Szabat - Solutions

In the modern era, tires last much longer than they used to.According to research, the life of tires has increased from 20,000 miles in 1970 to 80,000 miles in the recent decade. A wholesaler wants to estimate the life of a Goodyear tire. He examines a sample of 50 tires of the Goodyear brand and
You are the manager of a restaurant for a fastfood franchise. Last month, the mean waiting time at the drive-through window for branches in your geographic region, as measured from the time a customer places an order until the time the customer receives the order, was 3.7 minutes. You select a
If, in a sample of n = 160 selected from a left-skewed population, X = 65, and S = 21, would you use the t test to test the null hypothesis H0 : m = 60? Discuss.
If, in a sample of n = 16 selected from a left-skewed population, X = 65, and S = 21, would you use the t test to test the null hypothesis H0 : m = 60? Discuss.
In Problems 9.18, 9.19, and 9.20, what is your statistical decision if the alternative hypothesis, H1, is m ≠ 50?
In Problems 9.18 and 9.19, what are the critical values of t if the level of significance,a, is 0.05 and the alternative hypothesis, H1, is m ≠ 50?
In Problem 9.18, how many degrees of freedom does the t test have?
If, in a sample of n = 16 selected from a normal population, X = 56 and S = 12, what is the value of tSTAT if you are testing the null hypothesis H0: m = 50?
Suppose that in Problem 9.16, the standard deviation is 0.012 gallon.a. Repeat (a) through (d) of Problem 9.16, assuming a standard deviation of 0.012 gallon.
A bottled water distributor wants to determine whether the mean amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company is actually 1 gallon.You know from the water bottling company specifications that the standard deviation of the amount of water per
A survey of the monthly pocket money of 100 students shows an average of $100 per month, with a standard deviation of$25. At 95% confidence,a. determine confidence intervals.b. test if mean monthly pocket money is $95.
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours.A random sample of 64 CFLs indicates a sample mean life of 7,250 hours.a. At
Do marketing majors at your school study more than, less than, or about the same as marketing majors at other schools? The Washington Post reported the results of the National Survey of
In a nuts snack packet, it is mentioned that the content is 32% cashews and 68% peanuts. A researcher is trying to find out if the actual content of the packet has changed from what is stated on the packet. State the null hypothesis to check if the packets actually contain 32% cashews, H0, and the
Many consumer groups feel that the U.S. Food and Drug Administration (FDA) drug approval process is too easy and, as a result, too many drugs are approved that are later found to be unsafe. On the other hand, a number of industry lobbyists have pushed for a more lenient approval process so that
Suppose the defendant in Problem 9.9 is presumed guilty until proven innocent. How do the null and alternative hypotheses differ from those in Problem 9.9? What are the meanings of the risks of committing either a Type I or Type II error here?
In the U.S. legal system, a defendant is presumed innocent until proven guilty. Consider a null hypothesis, H0, that a defendatnt is innocent, and an alternative hypothesis, H1, that the defendant is guilty. A jury has two possible decisions: Convict the defendant(i.e., reject the null hypothesis)
What is the p-value if, in a two-tail hypothesis test, ZSTAT = -1.38?
In Problem 9.6, what is your statistical decision if you test the null hypothesis at the 0.10 level of significance?
What is the p-value if, in a two-tail hypothesis test, ZSTAT = +2.00?
What is your decision in Problem 9.4 if ZSTAT = -2.61?
If you use a 0.01 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting H0 : m = 12.5 if you use the Z test?
If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean equals 500 if you use the Z test?
If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if ZSTAT = +2.21?
If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if ZSTAT = -0.76?
Referring to the results in Problem 8.66 concerning the width of a steel trough, write a report that summarizes your conclusions.
The manufacturer of Boston and Vermont asphalt shingles provides its customers with a 20-year warranty on most of its products. To determine whether a shingle will last the entire warranty period, accelerated-life testing is conducted at the manufacturing plant. Accelerated-life testing exposes the
The manufacturer of Boston and Vermont asphalt shingles knows that product weight is a major factor in a customer’s perception of quality. The last stage of the assembly line packages the shingles before they are placed on wooden pallets. Once a pallet is full (a pallet for most brands holds 16
A manufacturing company produces steel housings for electrical equipment. The main component part of the housing is a steel trough that is made from a 14-gauge steel coil. It is produced using a 250-ton progressive punch press with a wipe-down operation that puts two 90-degree forms in the flat
A quality characteristic of interest for a teabag-filling process is the weight of the tea in the individual bags. In this example, the label weight on the package indicates that the mean amount is 5.5 grams of tea in a bag. If the bags are underfilled, two problems arise. First, customers may not
Claims fraud (illegitimate claims) and buildup (exaggerated loss amounts) continue to be major issues of concern among automobile insurance companies. Fraud is defined as specific material misrepresentation of the facts of a loss; buildup is defined as the inflation of an otherwise legitimate
The manufacturer of Ice Melt claims that its product will melt snow and ice at temperatures as low as 0° Fahrenheit. A representative for a large chain of hardware stores is interested in testing this claim. The chain purchases a large shipment of 5-pound bags for distribution. The representative
Scarlett and Heather, the owners of an upscale restaurant in Dayton, Ohio, want to study the dining characteristics of their customers. They decide to focus on two variables: the amount of money spent by customers and whether customers order dessert.The results from a sample of 60 customers are as
The branch manager of an outlet (Store 1) of a nationwide chain of pet supply stores wants to study characteristics of her customers. In particular, she decides to focus on two variables: the amount of money spent by customers and whether the customers own only one dog, only one cat, or more than
The financial impact of IT systems downtime is a concern of plant operations management today. A survey of manufacturers examined the satisfaction level with the reliability and availability of their manufacturing IT applications. The variables of focus are whether the manufacturer experienced
A national association devoted to human resource (HR) and workplace programs, practices, and training wants to study HR department practices and employee turnover of its member organizations. HR professionals and organization executives focus on turnover not only because it has significant cost
The human resource (HR) director of a large corporation wishes to study absenteeism among its mid-level managers at its central office during the year. A random sample of 25 mid-level managers reveals the following:• Absenteeism: X = 6.2 days, S = 7.3 days.• 13 mid-level managers cite stress as
An information technology (IT) consulting firm specializing in healthcare solutions wants to study communication deficiencies in the health care industry. A random sample of 70 health care clinicians reveals the following:• Time wasted in a day due to outdated communication technologies: X = 45
A market researcher for a consumer electronics company wants to study the media viewing behavior of residents of a particular area. A random sample of 40 respondents is selected, and each respondent is instructed to keep a detailed record of time spent engaged viewing content across all screens
What do Americans do to conserve energy? The Associated Press-NORC Center for Public Affairs Research conducted a survey of 897 adults who had personally done something to try to save energy in the last year (data extracted from “Energy Efficiency and Independence: How the Public Understands,
The Pew Internet Project survey of 2,253 American adults(data extracted from pewinternet.org/Commentary/2012/February/Pew-Internet-Mobile) found the following:1,983 have a cellphone 1,307 have a desktop computer 1,374 have a laptop computer 406 have an ebook reader 406 have a tablet computera.
When the population proportion is unknown, can you determine the sample size? If yes, what is the peculiarity of this sample size?
How are confidence levels decided in real life? Can 100%confidence level be used to determine a population parameter?
Given the sample data, how can we determine confidence intervals when the standard deviation of population is unknown?
What are the components for finding a confidence interval?What happens to confidence intervals when the confidence level is increased?
Which store do you think is more expensive—physical or online? A recent survey (USA Today, December 10, 2012, p. 1B)found that 46% of people aged 20 to 40 thought that physical stores were more expensive.a. To conduct a follow-up study that would provide 99% confidence that the point estimate is
According to a new study released by Infosys, a global leader in consulting, outsourcing, and technology, more than three-quarters (77%) of U.S. consumers say that banking on their mobile device is convenient. (Data extracted from “Infosys Survey Finds Mobile Banking Customers Love Ease and
In a study of 368 San Francisco Bay Area nonprofits, 224 reported that they are collaborating with other organizations to provide services, a necessity as nonprofit agencies are called upon to do more with less. (Data extracted from “2012 Nonprofit Pulse Survey,” United Way of the Bay Area,
A survey of 300 U.S. online shoppers was conducted. In response to the question of what would influence the shopper to spend more money online in 2012, 18% said free shipping, 13%said offering discounts while shopping, and 9% said product reviews. (Data extracted from “2012 Consumer Shopping
What advertising medium is most influential in making a purchase decision? According to a TVB survey, 37.2% of American adults point to TV. (Data extracted from “TV Seen Most Influential Ad Medium for Purchase Decisions,” MC Marketing Charts, June 18, 2012.)a. To conduct a follow-up study that
A growing niche in the restaurant business is gourmet-casual breakfast, lunch, and brunch. Chains in this group include EggSpectation and Panera Bread. Suppose that the mean per-person check for breakfast at EggSpectation is approximately $14.50, and the mean per-person check for Panera Bread is
An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station’s audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes.a. What sample size is needed if the agency wants to be 90%
A private energy supplier wants to estimate the monthly electricity utilization bill of a household in metro cities. Based on the reports published by the other suppliers, the standard deviation was found to be $20. The company wants to estimate the average monthly bill with 95% confidence level,
If the inspection division of a county weights and measures department wants to estimate the mean amount of soft-drink fill in 2-liter bottles to within {0.01 liter with 95% confidence and also assumes that the standard deviation is 0.05 liter, what sample size is needed?
If a light bulb manufacturing company wants to estimate, with 95% confidence, the mean life of compact fluorescent light bulbs to within {200 hours and also assumes that the population standard deviation is 1,000 hours, how many compact fluorescent light bulbs need to be selected?
The weekly salaries of trainees immediately after their master’s degree have $100 as standard deviation. Specify the sample size when the acceptable sampling error is within $20 or less at 95% confidence level of determining the average weekly salaries of the trainees after their master’s
A firm’s advertising policy for the following year will be dependent on the market preference for their product. Thus, the company is willing to estimate with 95% confidence level and the standard error of 0.05.a. Assume that preliminary reports indicate that 25% of users prefer their product,
Population parameter is an important component for the determination of the sample size for the proportion. Can you also determine the sample size when population parameter p is unknown? How?
What are the various components required for determining the sample size for the proportion? Explain in detail the meaning of population parameter. How is population parameter determined?
What are the various components required for determining the sample size for the mean? Explain in detail the meaning and relevance of the concept of acceptable sampling error. How is sampling error determined?
Determination of the ‘appropriate’ confidence intervals requires a sufficient sample size. Why is it important to determine the sample size? In real life, is the sample size determined before or after data collection?
In a survey, it was found that consuming fruit juices is not as healthy as consuming fruit. It is believed that fruit juices contain artificial flavors and preservatives (Source: http://www.fda.gov/food/guidanceregulation/guidancedocumentsregulatoryinformation/labelingnutrition/ucm064880.htm).
An insurance company proposes two health insurance plans for the employees of a company. Plan A is the basic plan and covers only the medication expenses in case of hospitalization, whereas plan B reimburses all the medical expenses of the employees. As a human resources manager, you are required
The management of a school wants to find out the absenteeism rate of the students in all of its 10 branches. They selected a random sample of 100 children and found that on an average there was an absenteeism rate of 7% in a semester. Construct a 95% confidence interval estimate for the population
Do students start working after they get a bachelor’s or a master’s degree? According to the survey of 47,626 college graduates, it was found that only 19,557 students hold the master’s degree and the rest 28,069 hold the bachelor’s degree. However, the report also shows that master’s
The results of the National Health and Nutrition Examination Survey for the year 2011-12 found that 12.9% of the adults of age 20 and more in the United States had high total cholesterol.(Source: http://www.cdc.gov/nchs/data/databriefs/db132.htm).a. Assume that a researcher surveys a sample size of
A cellphone provider has the business objective of wanting to estimate the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 500 subscribers. The results
If n = 400 and X = 25, construct a 99% confidence interval estimate for the population proportion.
If n = 200 and X = 50, construct a 95% confidence interval estimate for the population proportion.
One operation of a mill is to cut pieces of steel into parts that are used in the frame for front seats in an automobile. The steel is cut with a diamond saw, and the resulting parts must be cut to be within {0.005 inch of the length specified by the automobile company. The measurement reported
The file MarketPenetration contains Facebook penetration values (the percentage of a country’s population that are Facebook users) for 15 countries:
A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is
One of the major measures of the quality of service provided by any organization is the speed with which the organization responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major expansion in the past several
Is there a difference in the yields of different types of investments? The file CDRate contains the yields for a one-year certificate of deposit (CD) and a five-year CD for 23 banks in the United States as of March 20, 2013. (Data extracted from www.Bankrate.com, March 20, 2013.)a. Construct a 95%
The file SUV contains the overall MPG of 2013 small SUVs:a. Construct a 95% confidence interval estimate for the population mean MPG of 2013 small SUVs, assuming a normal distribution.b. Interpret the interval constructed in (a).c. Compare the results in (a) to those in Problem 8.19(a).
The file Sedans contains the overall miles per gallon(MPG) of 2013 midsized sedans:a. Construct a 95% confidence interval estimate for the population mean MPG of 2013 family sedans, assuming a normal distribution.b. Interpret the interval constructed in (a).c. Compare the results in (a) to those in
The file FastFood contains the amount that a sample of 15 customers spent for lunch ($) at a fast-food restaurant:a. Construct a 95% confidence interval estimate for the population mean amount spent for lunch ($) at a fast-food restaurant, assuming a normal distribution.b. Interpret the interval
The U.S. Department of Transportation requires tire manufacturers to provide tire performance information on the sidewall of a tire to better inform prospective customers as they make purchasing decisions. One very important measure of tire performance is the tread wear index, which indicates the
A survey of nonprofit organizations showed that online fundraising has increased in the past year.Based on a random sample of 55 nonprofits, the mean one-time gift donation in the past year was $75, with a standard deviation of $9.a. Construct a 95% confidence interval estimate for the population
A marketing researcher wants to estimate the mean savings($) realized by shoppers who showroom. Showrooming is the practice of inspecting products in retail stores and then purchasing the products online at a lower price. A random sample of 100 shoppers who recently purchased a consumer electronics
The weights of paint cans of a particular brand present a normal distribution. However, a customer doubts that the cans contain lesser quantity than what is written on the can packaging. He randomly selects 7 cans and finds the following weight in grams:Construct a 95% confidence interval for the
A case competition committee is required to select one from two schools. The members investigated the past grades of 8 randomly selected students. Following are the results of the samples:School 1: x = 67, s = 15 School 2: x = 75, s = 25 Construct the 99% confidence interval for the population
Consider the following sample drawn from a given population: 5, 6, 8, 10, 11, 12, 13, 15a. Calculate point estimate of population mean.b. Calculate standard deviation.c. Determine degrees of freedom.d. At 95% confidence level, calculate confidence interval for population mean.e. At 99% confidence
Comment on the largeness of the sample size so that S estimates s closely enough and that the t distribution becomes close enough to standardized normal distribution.
The operations manager at a compact fluorescent light bulb (CFL) factory needs to estimate the mean life of a large shipment of CFLs. The manufacturer’s specifications are that the standard deviation is 1,000 hours. A random sample of 64 CFLs indicated a sample mean life of 7,500 hours.a.
A bottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. The water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. A random sample
The quality control officer in a Coke manufacturing unit inspects the breaking strength of the glass bottles. The officer randomly selects a sample of 500 bottles from the production department to check the strength of the glass bottles. Do you think that the officer is justified in selecting the
Consider the confidence interval estimate discussed in Problem 8.5. Suppose the population mean time spent on the site is 36 minutes a day. Is the confidence interval estimate stated in Problem 8.5 correct? Explain.
The dean of a management school wants to check the knowledge of the students at his school about day to day international affairs. The dean arranged a quiz with 50 participants. Assume that the average score is 67 with the s of 15.a. Construct the 95% confidence interval in which the score of all
A market researcher selects a simple random sample of n = 100 Twitter users from a population of over 100 million Twitter registered users. After analyzing the sample, she states that she has 95% confidence that the mean time spent on the site per day is between 15 and 57 minutes. Explain the
Construct a 99% confidence interval for the data in question 8.3. Comparing the results of 95% and 99% confidence intervals, what conclusions can you draw? Is it feasible to construct a 100%confidence interval? Why or why not?
Investigating the sample size of 35, the sample mean and s were found to be 15 and 2. Construct a 95% confidence interval for p.
What do you understand by the terms ‘point estimate’ and‘confidence interval estimate’? How do these two estimates determine the population parameter?
What do you understand by the terms ‘deductive reasoning’and ‘inductive reasoning’? How do you think they are interrelated?
(Class Project) Suppose that step 3 of Problem 7.33 uses the following rule: “If a random digit between 0 and 8 is selected, consider the ball to be white; if a random digit of 9 is selected, consider the ball to be red.” Compare and contrast the results in this problem and those in Problem
(Class Project) Using a table of random numbers (Table E.1), simulate the selection of different-colored balls from a bowl, as follows:1. Start in the row corresponding to the day of the month in which you were born.2. Select one-digit numbers.3. If a random digit between 0 and 6 is selected,
(Class Project) The number of cars waiting in line at a car wash is distributed as follows:
(Class Project) Toss a coin 10 times and record the number of heads. If each student performs this experiment five times, a frequency distribution of the number of heads can be developed from the results of the entire class. Does this distribution seem to approximate the normal distribution?
(Class Project) The table of random numbers is an example of a uniform distribution because each digit is equally likely to occur. Starting in the row corresponding to the day of the month in which you were born, use a table of random numbers (Table E.1)to take one digit at a time.Select five
The article mentioned in Problem 7.28 reported that the stock market in China had a mean return of 1.54% in 2012. Assume that the returns for stocks on the Chinese stock market were distributed as a normal random variable, with a mean of 1.54 and a standard deviation of 10. If you select an

Showing 3900 - 4000 of 7675

First
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
Last

Step by Step Answers

Services

Sitemap
Fun
Definitions
Become Tutor
Used Textbooks
Study Help Categories
Recent Questions
Expert Questions
Campus Wear
Sell Your Books

Company Info

Security
Copyrights
Privacy Policy
Terms & Conditions
SolutionInn Fee
Scholarship
Online Quiz
Give Feedback, Get Rewards

Get In Touch

About Us
Contact Us
Career
Jobs
FAQ
Student Discount
Campus Ambassador

Secure Payment

Download Our App

© 2026 SolutionInn. All Rights Reserved