Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. You have no preconceived idea of what that proportion might be. What sample size is needed if you wish to be 95% confident that your estimate is within 0.05 of the true proportion?A sample size of is needed.(Round up to the nearest whole number.)

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Answered: Suppose you want to estimate the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose you want to estimate the proportion of traditional college students on your campus who own their own car You have no preconceived idea of what that proportion might be. What sample size is needed if you wish to be 90% confident that your estimate is within 0.04 of the true proportion? A sample size of (Round up to the nearest whole number.) is needed.
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 99% confident that you estimate is within 4.5% of the true population proportion. How large of a sample size is required?
You want to estimate the percentage of small incorporated businesses that are owned by women. A previous study suggests that this percentage is 34%. How many of these small businesses must be surveyed if you want 97% confidence that you sample percentage is within three percentage points of the true population percentage?
A recent study indicated that 43% of the 100 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions.
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 68%. You would like to be 98% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?
You plan to conduct a survey to estimate the percentage of adults who have had chickenpox. Find the number of people who must be surveyed if you want to be 93% confident that the sample percentage is within three percentage points of the true percentage for the population of all adults. Assume that nothing is known about the prevalence of chickenpox.
A random sample of medical files is used to estimate the proportion p of all people who have blood type B. If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 99% sure that the point estimate P will be within a distance of 0.04 from p? O 17 O 2081 O 4,161 1,041 O 33
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 27%. You would like to be 99% confident that your estimate is within 3.5% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 59%. You would like to be 90% confident that your estimate is within 3% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 98% confident that you estimate is within 1% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 62%. You would like to be 99% confident that your estimate is within 2.5% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 80% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required?

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