A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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- Out of 500 people sampled, 145 received flu vaccinations this year. Based on this, construct a 90% confidence interval for the true population proportion of people who received flu vaccinations this year.Give your answers as decimals, to three placesarrow_forwardIn a survey of 2345 adults, 729 say they believe in UFOs. Construct a 90 % confidence interval for the population proportion of adults who believe in UFOs. A 90%confidence interval for the population proportion is (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below. A. With 90% confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. B. With 90% probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval. C. The endpoints of the given confidence interval shows that 90% of adults believe in UFOs. D. With 90% confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval.arrow_forwardIn a survey of 2347 adults, 700 say they believe in UFOS. Construct a 90% confidence interval for the population proportion of adults who believe in UFOs. A 99% confidence interval for the population proportion is ( (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below. OA Wth 99% confidence, can be said that the sample proportion of adults who believe in UFOS is betwoen the endpoints of the given confidence interval. OB. Wth 99% confidence, it can be said that the population proportion of adults who beliove in UFOS is between the endpoints of the given confidence interval. OC. Weh 99% probability, the population proportion of adults who do not believe in UFOS is between the endpoints of the given confidence interval. OD. The endpoints of the given confidence interval shows that 99% of adults believe in UFOS.arrow_forward
- A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=935 and x=561 who said "yes." Use a 95% confidence level.arrow_forwardyou want to find out the percent of people who use an iPhone so you survey 120 random adults of whom 57 use an iPhone. what is the 95% confidence interval for P the put portion of all adults who use iPhonearrow_forwardIn a survey of 2343 adults, 700 say they believe in UFOs. Construct a 90%confidence interval for the population proportion of adults who believe in UFOs. Part 1 A 90% confidence interval for the population proportion is ( __, __ ) Interpret your results. Choose the correct answer below. A. The endpoints of the given confidence interval shows that 90% of adults believe in UFOs. B. With 90% confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. C. With 90% confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. D. With 90% probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval.arrow_forward
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