Suppose that administrators of a large school district wish to estimate the proportion of children in the district enrolling inkindergarten who attended preschool. They took a simple random sample of children in the district who are enrolling inkindergarten. Out of 75 children sampled, 51 had attended preschool.Construct a large-sample 99% z-confidence interval for p, the proportion of all children enrolled in kindergarten whoattended preschool. Give the limits of the confidence interval as decimals, precise to at least three decimal places.lower limit :.541upper limit:.819Construct a plus four 99% z-confidence interval for p. Give the limits of the confidence interval as decimals, precise to atleast three decimal places.lower limit :upper limit:

The formula for 100(1-α)% confidence interval for population proportion is, Here, p: the sample…

Answered: Suppose that administrators of a large…

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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In a survey of 310 U.S. adults, 39% said that their favorite sport to watch is football. Construct a 99% confidence interval for estimating the population proportion of U.S. adults who say that their favorite sport to watch is football. Give your answers accurate to three decimals.
A market research firm is hired to estimate the percent of adults living in a large city who have cell phones. The firm randomly selects 450 adult residents to determine whether they have cell phones. Of the 450 people sampled, 381 own cell phones. Compute a 90% confidence interval for the true proportion of adult residents of this city who have cell phones. Round the answer to three decimal places.
The American Heart Association is about to conduct in anti smoking campaign and wants to know the fraction of Americans over 35 who smoke. Suppose a sample of 1421 Americans over 35 is drawn of these people 412 smoke using the data to construct the 90% confidence interval for the population proportion of Americans over 35 who smoke.
A large public opinion polling agency plans to conduct a national survey to determine the proportion of employed adults who fear losing their job within the next year. They found that 35 out of 100 randomly selected employed adults fear losing their job within the next year. How many workers must be polled in order to construct a 95% confidence interval estimate with a margin of error of 1%? leave answer to 3 decimals if decimal
Of the 250 students surveyerd, 100 prefered asynchronous distance learning and 150 prefered synchronous distance learning. construct a 95% confidence interval for the proportion of stuednts who prefer asynchronous distance learning.
A random sample of 120 rhesus monkeys found that the number of rhesus monkeys that live in a captive breeding facility is 77. Construct a 90% confidence interval for the true proportion of rhesus monkeys that live in a captive breeding facility.
A recent survey showed that 42% of US employers were likely to require higher employee contributions for health care coverage. Suppose the survey was based on a sample of 500 companies. Find the 99% confidence interval for the proportion of all companies likely to require higher employee contributions for health care coverage. (Round to four decimal places)
In a preelection poll, a pollster finds that 442 out of 650 people polled favor Smith. Construct the 95% confidence interval for the proportion (nearest to 0.0001) of people in the whole population who favor Smith.
We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 228 had kids. Based on this, construct a 90% confidence interval for the proportion � of adult residents who are parents in this county. < � <
A recent survey of two countries in South America reports on data about foreign-born citizens. Of 500 randomly selected people in Peru, 125 reported as being born in another country; meanwhile, 75 of 800 randonly selected Argentinians reported as being foreign-born. Use this information to create a 95% confidence interval for the true difference in proportions of foreign born citizens between Peru and Argentina.

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