A random sample of 120 adults showed that 42 are already fully vaccinated.1. What is the best point estimate of the TRUE proportion of adults who are NOT fullyvaccinated? ( Select ]2. Find the margin of error for estimating the true proportion of FULLY VACCINATED adults at95% confidence level. ( Select]3. Based on the 95% confidence interval, is P=0.41 a valid claim for the true proportion of fullyvaccinated adults? [ Select ]

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Answered: random sample of 120 adults showed that…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A trucking fleet-owner owns two semi-trucks and wishes to compare the amount of fuel used per week by the two vehicles. In a random sample of 100 weeks, truck #1 used a mean volume of 340 gallons with a standard deviation of 11 gallons. In a second, independent random sample of 100 weeks, truck #2 used a mean volume of 331 gallons with standard deviation 6 gallons.It is of interest to construct a confidence interval for the difference in population means using a confidence level of 90 percent. ?1−?2, where ?1 is the mean fuel volume used by truck #1 and ?2 is the mean volume of fuel used by truck #2. Note: 340−331=9 and 112100+62100‾‾‾‾‾‾‾‾‾‾‾√=1.25299640861417 Your answers below should be entered as numbers. Do not round during intermediate steps. If you round an answer, make sure you do so correctly and keep at least three decimal places. (a) The estimate is: gallons. (b) The standard error is: gallons. (c) The multiplier is: .
In a sample of 16 fish from my pond it was found that 5 are under 165 grams in weight. Based on this sample data and suing it to estimate the standard error, what is the MARGIN OF ERROR for the 95 percent confidence interval for the true proportion of fish in my pond weighing under 165 grams?
A local health center noted that in a sample of 400 patients, 80 were referred to them by the local hospital. a) Provide a 95% confidence interval for the proportion of patients who are referred to the health center by the hospital. b) What sample size would be required to estimate the proportion of all hospital referrals to the health center with a margin of error of .04 at 95% confidence?
A survey of 2316 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 424 have donated blood in the past two years. a.) obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years b.) Construct and interpret a 90% confidence interval for the population proportion of adults in the country who have donated blood in the past two years. Select the correct choice below. We are ? % confident the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between ? and ? or There is a ?% probability the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between ? and ?
A newspaper article estimated that the mean cost for preventive dental care was $165 per year. They indicated that the estimate was based on a sample of 100 people and that the margin of error was 2.8. Assuming a 95% confidence level was used, calculate the value of the standard error
A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local hospital. a. Provide a 95% confidence interval for all the patients who are referred to the health centre by the hospital. b. What sample size would be required to estimate the proportion of all hospital referrals to the health centre with a margin of error of 0.04 or less at 95% confidence?
A college student organization wants to start a nightclub for students under the age of 21. To assess the support of this proposal, they will select a SRS of students and ask each respondent if he or she would patronize this type of establishment. What sample size is required to obtain a 90% confidence interval with an approximate margin of error of 0.04?
A restaurant would like to estimate the proportion of tips that exceed 18% of its dinner bills. Without any knowledge of the population proportion, determine the sample size needed to construct a 98% confidence interval with a margin of error of no more than 8% to estimate the proportion. The sample size needed is ____?___
A random sample of 250 preschool children in a local suburb revealed that only 232 had been vaccinated. Provide an approximate 95% confidence interval for the proportion vaccinated in that suburb. Give an interpretation of the confidence interval.
A poll of 547 adult Americans employed full or part time asked, “Generally speaking, would you say your commute to work is –very stressful, somewhat stressful, not that stressful, not stressful at all?” The result reported that 12% of American workers said that their commute was very stressful. (a)Obtain a point estimate for the population proportion ? of all adult Americans who would say their commute time was very stressful. (b) Verify that the requirements for constructing a confidence interval about ? are satisfied. (c) Construct a 90% confidence interval for ?. (d) Interpret the interval in part (c) within the context.
At my work there is a machine that dispenses 120 ml of coffee, but I believe that the machine is not dispensing 120 ml and out of 30 samples I measured the average amount of 111 ml with a standard deviation on 1.7. State the null and alternative hypotheses. At a 95 % confidence level, is there evidence to support the idea that the machine is not working properly?
A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local hospital. a. Provide a 95% confidence interval for all the patients who are referred to the health centre by the hospital. (5 marks) b. What sample size would be required to estimate the proportion of all hospital referrals to the health centre with a margin of error of 0.04 or less at 95% confidence

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