cutive pusu8. A survey will be conducted on the use of social media among senior high school students.a. How large a sample must be obtained if the researchers want to be 95% confident that themaximum error will not exceed 5%?b. Suppose the researchers conducted the survey involving 500 senior high school studentsand 400 responded that they have social media accounts. Give the 99% confidence intervalfor the true proportion of senior high school students who have social media accounts.

Here given survey about social media uses among the senior high school students

Answered: Soial media among senior high school…

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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4. An investigative reporter contacts a random sample of hotels, and finds a 95% confidence interval for the proportion of hotels in the United States that have reported having bedbugs is (0.04, 0.11). a. Interpret this confidence interval in context.
A high school counselor is interested in determining factors that contribute to high school drop out rates. One factor of interest to her is whether kids who are involved in team sports as children are less likely to drop out of high school. She surveys 41 high school graduates and finds that 30 were involved in team sports as children. She then surveys 38 high school dropouts and finds that 23 were involved in team sports as children. Construct and interpret a 90% confidence interval for the true difference between the proportions of high school graduates and dropouts who participated in team sports as children. Does this data suggest that there is a difference between these proportions at this level of confidence? Correctly round your results to the nearest tenth of a percent (one decimal place) in the intepretation of your interval.
To determine the proportion of Americans who support affirmative action policies for minorities and women seeking admission to colleges and universities, a sociologist wants to run a poll. What sample size should be collected if she wants the estimate to have a 90% confidence level and be within 4 percentage points?
A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Use a 99% confidence interval to estimate the true proportion of students on financial aid.
You are going to construct a 99% confidence interval for the proportion ofhip replacement recipients who require follow up physical or occupationaltherapy. You want the margin of error to be .045. Your initial guess is that72% of the population requires follow up physical or occupational therapy.What should the sample size be to achieve this margin of error?
A marketing study by Ford Motor Company finds that 320 of the 650 buyers of compact cars were women. Construct the 90% confidence interval for the proportion of all compact car buyers who are women, and explain what it means.
wwwomence level. Use E=1%. 2) In a survey of 700 random households in a particular city in NCR, adults have been asked if they use social media to stay connected with other people. There are 523 who have said yes. Use a 90% confidence to estimate the proportion of all Adults who use the social media to stay connected.
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.
Of 260 employees selected randomly from one company, 18.46% of them commute by carpooling. Construct a 98% confidence interval for the true percentage of all employees of the company who carpool. Interpret the results.
Find a 95% confidence interval for the true population proportion. In a poll of 1079 college students, 22% said that they had cheated at least once on an exam
4. A recent survey of 349 people ages 18 to 29 found that 86% of them own a smartphone. Find the 99% confidence interval of the population proportion.
1. A university dean is interested in determining the proportion of students who receive some financial aid. The dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Use a 95% confidence interval to estimate the proportion of students on financial aid.

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