We are interested in estimating the proportion of students at a university who smoke. Out of a random sample of 225 students from this univ 50 students smoke. (a) Calculate a 91% confidence interval for the proportion of students at this university who smoke. (b) If we wanted the margin of error to be no larger than 2% at a 91% confidence level for the proportion of students who smoke, how big o sample would we need? n
We are interested in estimating the proportion of students at a university who smoke. Out of a random sample of 225 students from this univ 50 students smoke. (a) Calculate a 91% confidence interval for the proportion of students at this university who smoke. (b) If we wanted the margin of error to be no larger than 2% at a 91% confidence level for the proportion of students who smoke, how big o sample would we need? n
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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![We are interested in estimating the proportion of students at a university who smoke. Out of a random sample of 225 students from this university, 50 students smoke.
(a) Calculate a 91% confidence interval for the proportion of students at this university who smoke.
( [Textbox for lower bound], [Textbox for upper bound] )
(b) If we wanted the margin of error to be no larger than 2% at a 91% confidence level for the proportion of students who smoke, how big of a sample would we need?
n = [Textbox for sample size].](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9ca41c16-4f8c-4ab4-a43c-8316ac02cc45%2Ffbd6dd65-7153-4be3-bb19-7bfdfd5b6b0e%2F7jii7f_processed.png&w=3840&q=75)
Transcribed Image Text:We are interested in estimating the proportion of students at a university who smoke. Out of a random sample of 225 students from this university, 50 students smoke.
(a) Calculate a 91% confidence interval for the proportion of students at this university who smoke.
( [Textbox for lower bound], [Textbox for upper bound] )
(b) If we wanted the margin of error to be no larger than 2% at a 91% confidence level for the proportion of students who smoke, how big of a sample would we need?
n = [Textbox for sample size].
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