Two researchers, Jaime and Mariya, are each constructing confidence intervals for the proportion of a population who is lef-handed. They find the point estimate is0.23. Each independently constructed a confidence interval based on the point estimate, but Jaime's interval has a lower bound of 0.220 and an upper bound of 0.234,while Mariya's interval has a lower bound of 0.169 and an upper bound of 0.272. Which interval is wrong? Why?28Choose the correct answer below.OA Jaime's interval is wrong because it does not include the point estimate.OB. Mariya's interval is wrong because it is too wide.OC. Mariya's interval is wrong because it is not centered on the point estimate,OD. Jaime's interval is wrong because it is to narrowO of 36

The point estimate is 0.23; p^=0.23 Jaime's interval=(0.226,0.234) Mariya's interval=(0.169,0.272)

Answered: Two researchers, Jaime and Mariya, are…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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Kit and Casey are each attempting to estimate the proportion of college students who can play at least one musical instrument. They each survey a different random sample of college students, and in each sample, the proportion who can play at least one musical instrument is 0.35. Kit and Casey each use their sample data to construct a confidence interval. Kit's interval is from 0.308 to 0.372 and Casey's interval is from 0.318 to 0.382. One of these intervals was computed correctly, but the other was not. Which interval must be incorrect? O Kit's interval must be incorrect. O It's impossible to answer this question without knowing the sample sizes. O It's impossible to answer this question without knowing the sample sizes or the level of confidence used for each interval. O Casey's interval must be incorrect. O It's impossible to answer this question without knowing the level of confidence used for each interval.
8% of a sample of 400 foster children say they have suffered some type of abuse from their foster parents. Construct the confidence interval for the population of foster children who have suffered some type of abuse. Use a 99% confidence level. answer the same way as in the problem before this one.
Matilda has constructed three confidence intervals, all from the same random sample. The confidence levels are 95%, 98%, 99.9%. The confidence intervals are 6.4<u<12.3, 5.1<u<13.6, and 6.8<u<11.8. Unfortunately, Matilda has forgotten which confidence interval goes with level. Match each confidence interval with its level. what confidence goes with each the confidence level and indicate whether these confidence intervals are for a population mean or for a population proportion, also include support with the results.
As part of the Pew Internet and American Life Project,, researchers conducted two surveys in late 2009. The first survey asked a random sample of 800 U.S. teens about their use of social media and the Internet. A second survey posed similar questions to a random sample of 2253 U.S. adults. In these two studies, 584 of the teens and 1059 of the adults said that they use social networking sites. Construct a 95% confidence interval for the difference in population proportions.
A 95% confidence interval is constructed in order to estimate the proportion of adults who own an iPhone. The resulting interval has a margin of error of 0.043. Which of the following would be the margin of error for a 90% confidence interval based on the same sample of data?
If we calculate a 95% confidence interval (CI) instead of a 99% confidence interval, then: A. The midpoint and the width of the CI would increase. B. The midpoint of the CI would decrease, but the width would be unchanged. C. The midpoint and the width of the CI would decrease. D. The midpoint of the CI would be unchanged, but the width would decrease.
In a random sample of 250 high school students, it was found that 85.2% (213) of them later graduated. Find the 95% and 98% confidence interval for the true proportion of all high school students who graduate. Compare the two proportions.
At one large college, 660 out of the 1500 students surveyed said they plan to take another science class.Find the 95% confidence interval for the proportion of students that said they plan to take another science class.
If n = 101, x=43, and s = 15, construct a confidence interval at a 80% confidence level. Give your answers to one decimal place. Technology.
According to a poll, 86% of California adults (434 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California. Find a 90% confidence interval for the population proportion. (Round your answers to three decimal places.) X * Enter a number.
If n=450 and X = 360, construct a 99% confidence interval.Give your answers to three decimals
If two people used the same data and one person made a 90% confidence interval and the other person made a 95% confidence interval for p, which interval would be more narrow? is it; a. The 90% Confidence interval b. The 95% Confidence interval c. We cannot tell from the information alone.

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