The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 44 who smoke. In an earlier study, thepopulation proportion was estimated to be 0.2.How large a sample would be required in order to estimate the fraction of Americans over 44 who smoke at the 80 % confidence level with an error of at most 0.03?Round your answer up to the next integer.Answor

The objective is to determine the sample size.The formula of sample size is,Here, denotes…

Answered: The American Heart Association is about…

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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Similar questions

A quality control specialist wants to estimate the percentage of defective batteries within 5% from the true value, at the 90% confidence level. How many batteries should be randomly sampled? Round your answer up to a whole number.
A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n = 1026 and x = 520 who said “yes." Use a 95% confidence level. Find the best point estimate of the population proportion p
If your target population is 123, how many samples do you need for a sampling error of .05 and a level of confidence of 95 percent (.05 level)? Show your solution.
Fear of the dark is quite common among children. However, what about adults? One polling agency released the results of a survey that asked people over 30 years old if they keep the lights on at night. Among 452 respondents, 34% indeed leave the light on when going to sleep. What does this margin of error tell you about the percentage of adults who keep the lights on at night? We can be 95% confident that somewhere between % and % of adults keep the lights on at night.
Suppose we estimated that 68 percent of Santa Fe students believe that black coffee is disgusting. If we wanted to know the true proportion of the students who share the same view at 99 percent confidence and 4.5 percent margin of error, how many people would we need to sample?
Vlad the Impaler promotes many of his soldiers into generals (don't ask what happened to the past generals). Haley thinks the proportion is about 79%, but wants to estimate the proportion better by sampling soldiers until her margin of error for a 93% Confidence Interval is less than 0.005. How many soldiers should Haley sample?
The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 28 who smoke. In an earlier study, the population proportion was estimated to be 0.20 How large a sample would be required in order to estimate the fraction of Americans over 28who smoke at the 90% confidence level with an error of at most 0.020? Round your answer up to the next integer.
A recent survey of 1,000 people found that 90% of Americans support background checks for purchasing guns. Construct a 95 % confidence interval for the population proportion.
.Studies have shown that approximately 5.3% of Americans have French heritage. You want to know how accurate this percentage is with 95% confidence and a margin of error of 3%. How many Americans you should randomly select

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