A survey of 464 US adults asked each participant to answer the question, "How far will a car travel in 45 minutes of it travels a constant speed of 40 miles per hour?" The correct answer was given by 254 adults. a. Assuming that the sample is random, find a 95% confidence interval for the proportion of adults who correctly answered the question. b. What sample size is necessary to find a 99% confidence interval with a margin of error within 4%?
A survey of 464 US adults asked each participant to answer the question, "How far will a car travel in 45 minutes of it travels a constant speed of 40 miles per hour?" The correct answer was given by 254 adults. a. Assuming that the sample is random, find a 95% confidence interval for the proportion of adults who correctly answered the question. b. What sample size is necessary to find a 99% confidence interval with a margin of error within 4%?
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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