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Translate the statement into a confidence interval. Approximate the level of confidence. In a survey of 1011 parents of children ages 8-14, 70% say they are willing to get a second or part-time job to pay for their children's college education and 42% say they lose sleep worrying about college costs. The survey's margin of error is +2%. Use the results from the survey about getting a second or part-time job. The confidence interval for the proportion is ( (Round to three decimal places as needed.)

Translate the statement into a confidence interval. Approximate the level of confidence. In a survey of 1011 parents of children ages 8-14, 70% say they are willing to get a second or part-time job to pay for their children's college education and 42% say they lose sleep worrying about college costs. The survey's margin of error is +2%. Use the results from the survey about getting a second or part-time job. The confidence interval for the proportion is ( (Round to three decimal places as needed.)

MATLAB: An Introduction with Applications
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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Translate the statement into a confidence interval. Approximate the level of confidence. In a survey of 1011 parents of children ages 8-14, 70% say they are willing to get a second or part-time job to pay for their children's college education and 42% say they lose sleep worrying about college costs. The survey's margin of error is +2%. Use the results from the survey about getting a second or part-time job. The confidence interval for the proportion is ( D (Round to three decimal places as needed.)
Transcribed Image Text:Translate the statement into a confidence interval. Approximate the level of confidence. In a survey of 1011 parents of children ages 8-14, 70% say they are willing to get a second or part-time job to pay for their children's college education and 42% say they lose sleep worrying about college costs. The survey's margin of error is +2%. Use the results from the survey about getting a second or part-time job. The confidence interval for the proportion is ( D (Round to three decimal places as needed.)
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 2% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 38% of the respondents said they eat fast food four to six times per week. (c) Compare the results from parts (a) and (b). (a) What is the minimum sample size needed assuming that no prior information is available? n= (Round up to the nearest whole number as needed.)
Transcribed Image Text:A researcher wishes to estimate, with 90% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 2% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 38% of the respondents said they eat fast food four to six times per week. (c) Compare the results from parts (a) and (b). (a) What is the minimum sample size needed assuming that no prior information is available? n= (Round up to the nearest whole number as needed.)
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