Applied Statistics in Business and Economics
5th Edition
ISBN: 9780077837303
Author: David Doane, Lori Seward Senior Instructor of Operations Management
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 8, Problem 61CE
A random sample of 21 nickels measured with a very accurate micrometer showed a
(Source: Data are from a project by MBA student Bob Tindall.)
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
3.2/2
A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation σ = 5 .
1. At 95% confidence, determine the interval estimate (confidence interval) of the population mean ? (2 DECIMALS)
2. Provide an interpretation for the interval estimate determined in Question 1
18.) A type-K thermocouple with special limit error was used for measuring the temperature of a hot
liquid. After six-repeated measurements, the standard deviation was determined to be 1.3°C. Calculate
the total uncertainty for the thermocouple. Use a 95% confidence level for the precision uncertainty.
Chapter 8 Solutions
Applied Statistics in Business and Economics
Ch. 8.2 - Find the interval zn,+zn within which 90 percent...Ch. 8.2 - Find the interval zn,+zn within which 95 percent...Ch. 8.2 - The diameter of bushings turned out by a...Ch. 8.2 - Concerns about climate change and CO2 reduction...Ch. 8.3 - (a) Find the standard error of the mean for each...Ch. 8.3 - (a) Find the standard error of the mean for each...Ch. 8.3 - The fat content of a pouch of Keebler Right Bites...Ch. 8.3 - The fuel economy of a 2011 Lexus RX 350 2WD 6...Ch. 8.4 - Construct a confidence interval for assuming that...Ch. 8.4 - Construct a confidence interval for assuming that...
Ch. 8.4 - Use the sample information x = 2.4, = 0.15, n = 9...Ch. 8.4 - Use the sample information x = 37, = 5, n = 15 to...Ch. 8.4 - A random sample of 25 items is drawn from a...Ch. 8.4 - A random sample of 100 items is drawn from a...Ch. 8.4 - The fuel economy of a 2011 Lexus RX 350 2WD 6...Ch. 8.4 - Guest ages at a Vail Resorts ski mountain...Ch. 8.4 - The Ball Corporations beverage can manufacturing...Ch. 8.5 - Find a confidence interval for assuming that each...Ch. 8.5 - For each value of d.f. (degrees of freedom), look...Ch. 8.5 - For each value of d.f. (degrees of freedom), look...Ch. 8.5 - A random sample of 10 items is drawn from a...Ch. 8.5 - A random sample of 25 items is drawn from a...Ch. 8.5 - A sample of 21 minivan electrical warranty repairs...Ch. 8.5 - A random sample of 16 pharmacy customers showed...Ch. 8.5 - A random sample of monthly rent paid by 12 college...Ch. 8.5 - A random sample of 10 shipments of stick-on labels...Ch. 8.5 - Prof. Green gave three exams last semester. Scores...Ch. 8.6 - Calculate the standard error of the sample...Ch. 8.6 - Calculate the standard error of the sample...Ch. 8.6 - Should p be assumed normal? a. n = 200, = .02 b....Ch. 8.6 - Should p be assumed normal? a. n = 25, =.50 b. n...Ch. 8.6 - Find the margin of error for a poll, assuming that...Ch. 8.6 - A car dealer is taking a customer satisfaction...Ch. 8.6 - In a sample of 500 new websites registered on the...Ch. 8.6 - From a list of stock mutual funds, 52 funds were...Ch. 8.6 - Of 43 bank customers depositing a check, 18...Ch. 8.6 - A survey showed that 4.8 percent of the 250...Ch. 8.7 - Calculate the FPCF for each sample and population...Ch. 8.7 - Use the following informationx=50, = 15, n = 90,...Ch. 8.7 - Use the following informationx=3.7, s = 0.2, n =...Ch. 8.7 - A random survey of 500 students was conducted from...Ch. 8.8 - For each level of precision, find the required...Ch. 8.8 - Last year, a study showed that the average ATM...Ch. 8.8 - The EPA city/hwy mpg range for a Saturn Vue FWD...Ch. 8.8 - Popcorn kernels are believed to take between 100...Ch. 8.8 - Analysis showed that the mean arrival rate for...Ch. 8.8 - Noodles Company wants to estimate the mean...Ch. 8.8 - In an intra-squad swim competition, mens freestyle...Ch. 8.8 - The city fuel economy of a 2009 Toyota 4Runner 2WD...Ch. 8.9 - What sample size would be required to estimate the...Ch. 8.9 - What sample size would be needed to estimate the...Ch. 8.9 - What sample size would be needed to estimate the...Ch. 8.9 - What sample size would be needed to estimate the...Ch. 8.9 - How large a sample size would be needed to...Ch. 8.9 - Inspection of a random sample of 19 aircraft...Ch. 8.10 - Find the 95 percent confidence interval for the...Ch. 8.10 - The weights of 20 oranges (in ounces) are shown...Ch. 8.10 - A pediatricians records showed the mean height of...Ch. 8.10 - Find the 90 percent confidence interval for the...Ch. 8 - Define (a) parameter, (b) estimator, (c) sampling...Ch. 8 - Explain the difference between sampling error and...Ch. 8 - Name three estimators. Which ones are unbiased?Ch. 8 - Explain what it means to say an estimator is (a)...Ch. 8 - State the main points of the Central Limit Theorem...Ch. 8 - Why is population shape of concern when estimating...Ch. 8 - (a) Define the standard error of the mean. (b)...Ch. 8 - Define (a) point estimate, (b) margin of error,...Ch. 8 - List some common confidence levels. What happens...Ch. 8 - List differences and similarities between Students...Ch. 8 - Give an example to show that (a) for a given...Ch. 8 - Why do outliers and skewed populations pose a...Ch. 8 - (a) State the Central Limit Theorem for a...Ch. 8 - (a) Define the standard error of the proportion....Ch. 8 - When would you use the FPCF and what does it do to...Ch. 8 - Prob. 16CRCh. 8 - When calculating a sample size for a proportion,...Ch. 8 - Why would we be interested in a confidence...Ch. 8 - A random sample of 30 lunch orders at Noodles ...Ch. 8 - A random sample of 21 nickels measured with a very...Ch. 8 - A random sample of 10 miniature Tootsie Rolls was...Ch. 8 - Statistics students were asked to go home and fill...Ch. 8 - A sample of 20 pages was taken without replacement...Ch. 8 - Twenty-five blood samples were selected by taking...Ch. 8 - A sample of 20 pages was taken from a Yellow Pages...Ch. 8 - Sixteen owners of 2010 Audi A4 sedans kept track...Ch. 8 - Twenty-five blood samples were selected by taking...Ch. 8 - Twenty-one warranty repairs were selected from a...Ch. 8 - Dave the jogger runs the same route every day...Ch. 8 - A pediatricians records showed the mean height of...Ch. 8 - A random sample of 10 exam scores showed a...Ch. 8 - A random sample of 30 lunch orders at Noodles ...Ch. 8 - During the Rose Bowl, the length (in seconds) of...Ch. 8 - A sample of 40 CDs from a student’s collection...Ch. 8 - The Environmental Protection Agency (EPA) requires...Ch. 8 - In a sample of 100 Planters Mixed Nuts, 19 were...Ch. 8 - A study showed that 14 of 180 publicly traded...Ch. 8 - How decaffeinated is decaffeinated coffee? If a...Ch. 8 - Noodles Company wants to estimate the percent of...Ch. 8 - Junior Achievement and Deloitte commissioned a...Ch. 8 - A random sample of 30 cans of Del Vino crushed...Ch. 8 - A poll of 125 college students who watch The Big...Ch. 8 - A survey of 4,581 U.S. households that owned a...Ch. 8 - A teen ethics poll was commissioned by Junior...Ch. 8 - Biting an unpopped kernel of popcorn hurts! As an...Ch. 8 - A sample of 213 newspaper tire ads from several...Ch. 8 - A physicians billing office conducted a random...Ch. 8 - Of 250 college students taking a statistics class,...Ch. 8 - (a) A poll of 2,277 likely voters was conducted on...Ch. 8 - To determine the proportion of taxpayers who...Ch. 8 - A sample of 40 CDs from a student’s collection...Ch. 8 - Vail Resorts would like to send a survey to their...Ch. 8 - This is an exercise using Excel. (a) Use...
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
- An oceanographer claims that the mean dive depth of a North Atlantic right whale is 115 meters. A random sample of 34 dive depths has a mean of 121.2 meters and a standard deviation of 24.2 meters. Is there enough evidence to reject the claim at α = 0.05?Given= 121.2 =115m Standard deviation=24.2 n=34arrow_forwardA random sample of 85 eighth grade students' scores on a national mathematics assessment test has a mean score of 276. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 270. Assume that the population standard deviation is 31. At α=0.08, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H0 and Ha.Choose the correct answer below. A. H0:μ≤270 Ha:μ>270(claim) B. H0:μ=270 Ha:μ>270(claim) C. H0:μ=270(claim) Ha:μ>270 D. H0:μ≥270(claim) Ha:μ<270 E. H0:μ≤270(claim) Ha:μ>270 F. H0:μ<270 Ha:μ≥270(claim) (b) Find the standardized test statistic z, and its corresponding area. z= (Round to two decimal places as needed.) (c) Find the P-value. P-value= (Round to three decimal places as…arrow_forwardA random sample of 76 eighth grade students' scores on a national mathematics assessment test has a mean score of 267. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 33. At α=0.11, is there enough evidence to support theadministrator's claim? Complete parts (a) through (e).arrow_forward
- A random sample of 84 eighth grade students' scores on a national mathematics assessment test has a mean score of 268. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 33. At α = 0.08, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and H₂. Choose the correct answer below. Ο A. Ho: μ 260 B. Ho: μ ≥260 (claim) Ha: μ 260 O C. Ho: μ = 260 Ha: μ> 260 (claim) F. Ho: μ≤260 Ha: μ> 260 (claim)arrow_forwardA random sample of 87 eighth grade students' scores on a national mathematics assessment test has a mean score of 288. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 285. Assume that the population standard deviation is 36. At α=0.07, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H0 and Ha. b) Find the standardized test statistic z, and its corresponding area. (c) Find the P-value. (d) Decide whether to reject or fail to reject the null hypothesis.arrow_forwardA random sample of 89 eighth grade students' scores on a national mathematics assessment test has a mean score of 262. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 35. At α=0.13, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H0 and Ha. (b) Find the standardized test statistic z, and its corresponding area. z= (c) Find the P-value. P-value= (d) Decide whether to reject or fail to reject the null hypothesis. (e) Interpret your decision in the context of the orginal claim.arrow_forward
- A random sample of 84 eighth grade students' scores on a national mathematics assessment test has a mean score of 290. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 285. Assume that the population standard deviation is 36. At α=0.07, is there enough evidence to support the administrator's claim? Complete parts (a) through (e).arrow_forwardA random sample of 130130 observations produced a mean of ?=30.2x¯=30.2 from a population with a normal distribution and a standard deviation ?=4.49σ=4.49. (a) Find a 9999% confidence interval for ?μarrow_forwardQuestion 2 Assume that a sample is used to estimate a population mean µ. Find the margin of error M.E. that corresponds to a sample of size 5 with a mean of 78.6 and a standard deviation of 13.6 at a confidence level of 99.5%. Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. М.. - Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Question Help: DVideo M Message instructor D Post to forum Submit Question e Type here to search f2 tA ?. 米 esc I0I 144 144 %23 24 2 5 W R tab Faps lock D B 4. A-arrow_forward
- in a preliminary sample of men from a certain geographical region, the standard deviation of their heights was 27.3 inches. What sample size would be required to estimate the average height of men in this population with an error of at most 6 inch and a confidence level of 95%?arrow_forwardA random sample of 85 eighth grade students' scores on a national mathematics assessment test has a mean score of 292. This test result prompts a state school administrator declare that the mean score for the state's eighth graders on this exam is more than 285. Assume that the population standard deviation is 39. At a = 0.09, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and H₂. Choose the correct answer below. B. Ho: ≤285 OA. Ho: H=285 (claim) H:H>285 OD. Ho: H=285 Ha: μ> 285 (claim) Ha: H>285 (claim) OE. Ho: 285arrow_forwardthe concentration of heaxane 0a common solvent) was measured in units of micrograms per liter for a simple random sample of ninteen specimens of untreated ground water taken near a municipal landfill. the sample mean was 508.4 with a sample standard deviation of 4.3. sixteen specimens of treated ground water had an average hexane concentration of 506.1. with a standard deviation of 4.7. it is responsable to assume that both sample come from populations that are approximately normal. can you conclude that the mean hexane concentration is less in treated water than in untreated water? use the α= 0.01 level of significance. A). yes B). Noarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSON
The Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. Freeman
Introduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman
Hypothesis Testing using Confidence Interval Approach; Author: BUM2413 Applied Statistics UMP;https://www.youtube.com/watch?v=Hq1l3e9pLyY;License: Standard YouTube License, CC-BY
Hypothesis Testing - Difference of Two Means - Student's -Distribution & Normal Distribution; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=UcZwyzwWU7o;License: Standard Youtube License