EBK BUSINESS STATISTICS
7th Edition
ISBN: 8220102743984
Author: STEPHAN
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
error_outline
This textbook solution is under construction.
Students have asked these similar questions
Most engaged couples expect or at least hope that they will have high levels of marital satisfaction. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital satisfaction. (Data Source: National Center for Health Statistics.)
A counseling psychologist sets out to look at the role of having children in relationship longevity. She decides to measure marital satisfaction in a group of couples with children and a group of childless couples. She chooses the Marital Satisfaction Inventory, because it refers to "partner" and "relationship" rather than "spouse" and "marriage," which makes it useful for research with both traditional and nontraditional couples.
Higher scores on the Marital Satisfaction Inventory indicate greater satisfaction. Assume that these scores are normally distributed.
A sample of 39 couples with children scored an average of 51.1 with a sample standard deviation of 9.2 on the Marital Satisfaction…
Most engaged couples expect or at least hope that they will have high levels of marital satisfaction. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital satisfaction. (Data Source: National Center for Health Statistics.)
A counseling psychologist sets out to look at the role of having children in relationship longevity. She decides to measure marital satisfaction in a group of couples with children and a group of childless couples. She chooses the Marital Satisfaction Inventory, because it refers to "partner" and "relationship" rather than "spouse" and "marriage," which makes it useful for research with both traditional and nontraditional couples.
Higher scores on the Marital Satisfaction Inventory indicate greater satisfaction. Assume that these scores are normally distributed.
A sample of 39 couples with children scored an average of 51.1 with a sample standard deviation of 9.2 on the Marital Satisfaction…
A federal auditor for nationally chartered banks, from a random sample of 100 accounts, found that the average demand deposit balance at the First National Bank of Arkansas was $549.82. If the auditor needed a point estimate for the population mean for all accounts at this bank, what should he use?
There's no acceptable value available.
The average of $549.82 for this sample.
The auditor should survey the total of all accounts and determine the mean.
The average of $54.98 for this sample.
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
- What is meant by the sample space of an experiment?arrow_forwardAccording to a poll, 81% of California adults (409 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.What is a point estimate for the true population proportion?arrow_forwardYou may need to use the appropriate appendix table or technology to answer this question. A survey asked senior executives at large corporations their opinions about the economic outlook for the future. One question was, "Do you think that there will be an increase in the number of full-time employees at your company over the next 12 months?" In the current survey, 228 of 400 executives answered Yes, while in a previous year survey, 176 of 400 executives had answered Yes. Provide a 95% confidence interval estimate for the difference between the proportions at the two points in time. (Use current year previous year. Round your answer to four decimal places.) to What is your interpretation of the interval estimate? The 95% confidence interval ---Select--- ✓zero. This suggests that the proportion of executives who are predicting an increase in full- time jobs for the current year is ---Select--- ✓ than the proportion of executives who were predicting an increase in full-time jobs for the…arrow_forward
- Morning Consult/Politico poll of 1997 registered voters in July 2020 asked a standard polling question of whether the United States was headed in the "Right Direction" or was on the "Wrong Track." 74.9% said that things are on the wrong rack vs. 25.1% who said "right direction." Complete parts a and b. a) Calculate the margin of error for the proportion of all U.S. adults who think things are on the wrong track for 99% confidence. ME= .025 (Round to three decimal places as needed.) b) Explain what this margin of error means. Select the correct choice below and fill in the answer box within your choice. (Round to three decimal places as needed.) OA. One is 99% confident that the observed proportion of adults that responded "Wrong Track" is within sample proportion. B. The probability that any given adult surveyed from the population will respond "Wrong Track" is C. One is 99% confident that the observed proportion of adults that responded "Wrong Track" is within population proportion.…arrow_forwardA Morning Consult/Politico poll of 1997 registered voters in July 2020 asked a standard polling question of whether the United States was headed in the "Right Direction" or was on the "Wrong Track." 74.9% said that things are on the wrong track vs. 25.1% who said "right direction." Complete parts a and b. a) Calculate the margin of error for the proportion of all U.S. adults who think things are on the wrong track for 99% confidence. (Round to three decimal places as needed.) ME= ew an example Get more help. The data are Simple Random Sample from the e tv = + I' M13A1 A C 10 √i 8074.heic Vi 1. (0,0) More Clear all Check answer 2022-0....10.45 AM 2022-0...09.49 AM 2022-0....07.20 AM MPEG47 Save DOCK JPEG X SCE 22- sign MMarrow_forwardYou work for a consumer advocate agency and want to find the mean repair cost of a washing machine. As part of your study, you randomly select 29 repair costs and find the mean to be $100.00 and o is $17.50. a. Construct a 90% confidence interval. b. Construct a 95% confidence interval. c. Construct a 99% confidence interval.arrow_forward
- In a survey of 1,626,773 U.S. adults, 49,311 personally identified as lesbian, gay, bisexual, or transgender. Construct a 95% confidence interval for the population portion of U.S. adults who personally identify as gay, lesbian,bisexual or transgender.arrow_forwardIn the midst of labor-management negotiations, the president of a company argues that the company's blue-collar workers, who are paid an average of $43,000 per year, are well paid because the mean annual income of all blue-collar workers in the country is less than $43,000. That figure is disputed by the union, which does not believe that the mean blue- collar income is less than $43,000. To test the company president's belief, an arbitrator draws a random sample of 225 blue-collar workers from across the country and asks each. to report his or her annual income. The sample mean annual income of the 225 randomly selected blue-collar workers was $43,318. Assume that the population standard deviation is $5,000. Can it be inferred at the 5% significance level that the company president is correct? 1. To test: Ho: H 2. Test Statistic (Round to 3 decimals): z = 3. p-value (Round to 3 decimals): vs. Ha: H Conclusion: At a = do not reject Ho insufficient evidence to conclude that the…arrow_forwardIn statistics, what is a Confidence Interval and how confidence intervals are used in research?arrow_forward
- In a recent Gallup poll, pollsters randomly selected adults and asked them whether they smoke. Among the adults who responded to the survey question, 21% said that they did smoke. Is that value of 21% an example of a statistic or a parameter?arrow_forwardA poll of 5000 residents in Brazil, Canada, China, France, Malaysia, South Africa, and the United States asked about what profession they would prefer their marriage partner to have. The choice receiving the highest percent, 805 of the responses, was doctors, nurses, and other health care professionals. Find a 99% confidence interval for the proportion of people who would prefer a doctor, nurse, or other health care professional as a marriage partner.arrow_forwardSleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 21.321.3 million out of the 312.7312.7 million Americans suffer from sleep apnea, or approximately 6.8%6.8%. A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population’s percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 6.8%6.8%, a simple random sample of 412412 commercial truck drivers is examined by a medical expert, who concludes that 1717 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 6.8%6.8%? Use a 0.050.05 level of significance. Step 4 of 4: Draw a conclusion and…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
Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu...
Algebra
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:Houghton Mifflin Harcourt
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Statistics 4.1 Point Estimators; Author: Dr. Jack L. Jackson II;https://www.youtube.com/watch?v=2MrI0J8XCEE;License: Standard YouTube License, CC-BY
Statistics 101: Point Estimators; Author: Brandon Foltz;https://www.youtube.com/watch?v=4v41z3HwLaM;License: Standard YouTube License, CC-BY
Central limit theorem; Author: 365 Data Science;https://www.youtube.com/watch?v=b5xQmk9veZ4;License: Standard YouTube License, CC-BY
Point Estimate Definition & Example; Author: Prof. Essa;https://www.youtube.com/watch?v=OTVwtvQmSn0;License: Standard Youtube License
Point Estimation; Author: Vamsidhar Ambatipudi;https://www.youtube.com/watch?v=flqhlM2bZWc;License: Standard Youtube License