EP BUSINESS STATISTICS:FIRST COURSE-ACC
8th Edition
ISBN: 9780135179802
Author: Levine
Publisher: PEARSON CO
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in a survey of 692 lesbian, gay, bisexual, or transgender U.S adults 378 said that they consider themselves bisexual. Construct a 90% confidence interval for the population proportion of lesbian, gay, bisexual, or transgender U.S adults who consider themselves bisexual.
A doctor would like to estimate the mean difference in the number of hours of sleep for seniors in high school and seniors in college. To do so, he selects a random sample of 50 high school seniors from all high schools in his county. He also selects a random sample of 50 seniors from the colleges in his county. He would like to construct a 95% confidence interval for the true mean difference in the number of hours of sleep for seniors in high school and seniors in college. Are the conditions for inference met?
Yes, all three conditions for inference are met.
No, the random condition is not met for both samples.
No, the 10% condition is not met for both samples.
No, the Normal/large sample condition is not met for both samples.
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.
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- What is meant by the sample space of an experiment?arrow_forwardWhat is a sample space?arrow_forwardAccording to a recent survey of 1600 people, 62 % feel that the president is doing an acceptable job. Construct a 90 % confidence interval for the population proportion of people who feel the president is doing an acceptable job.arrow_forward
- According to a poll, 81% of California adults (411 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_forwardAn internet service provider sampled 540 customers and found that 55 of them experienced an interruption in their service during the previous month. Construct a 95% confidence interval for the proportion of all the customers who have experienced a service interruption. Interpret the results.arrow_forwardThe National Research center conducted a survey of 1000 people to learn about their major international concern. The survey results showed that 760 of the respondents indicated computer cyber attacks is their major international concern. Develop a 94% confidence interval for the population proportion of adults who think computer cyber attacks is their major international concern.arrow_forward
- 7arrow_forwardAn actuary is interested in estimating the proportion of young adults who plan to have children someday she takes an SRS of 60 young adults and finds that 48 of them plan to have children construct A 99% confidence interval for the proportion of young adults who plan to have children someday.arrow_forwardDefine the confidence level?arrow_forward
- In a survey of 500 women, 120 said that Valentine’s Day was their favorite occasion to receive flowers. Construct an 88% confidence interval for the proportion of all women who feel that Valentine’s Day is their favorite occasion to receive flowers.arrow_forwardA survey showed 980 of 1500 adult respondents believe in global warming. Construct a 95% confidence interval estimate of the proportion of adults believing in global warming.arrow_forwardIn a Gallup poll of 804 randomly selected adults living in the 50 U.S. states and the District of Columbia, 466 felt that gay and lesbian relationships were morally acceptable. Construct a 95% confidence interval for the proportion of Americans who feel that gay and lesbian relationships are morally acceptable.arrow_forward
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