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times, and 20% responded yes. Complete parts (a through (d) below can Fears asked a random sample of 1207 American adts they belieed that alens had come to Eartme modem a What s the standard emor tor ths estmate of the percentage of a Amencans who beeve that aens have come totam n mooern smes Round to four decimal places as needed) b. Find a 90% oonfidence interval for the proportion of all Americans who believe that alens have come to Earth in modem time K (Round to two decimal places as needed) c What is the margin of eror for the 90% confidence interval NRound to two decimal places as needed) d Suppose that a similar poll conducted 2016 found that 243% of Americans believed alens have come to Earth in modem times Based on your oddence interval, can you condlude that the proportion of Americans who believe this has increased sinoe 20107 OA The interval does not support this ciaim This is because 243% s not in the interval and all values are above 24%

times, and 20% responded yes. Complete parts (a through (d) below can Fears asked a random sample of 1207 American adts they belieed that alens had come to Eartme modem a What s the standard emor tor ths estmate of the percentage of a Amencans who beeve that aens have come totam n mooern smes Round to four decimal places as needed) b. Find a 90% oonfidence interval for the proportion of all Americans who believe that alens have come to Earth in modem time K (Round to two decimal places as needed) c What is the margin of eror for the 90% confidence interval NRound to two decimal places as needed) d Suppose that a similar poll conducted 2016 found that 243% of Americans believed alens have come to Earth in modem times Based on your oddence interval, can you condlude that the proportion of Americans who believe this has increased sinoe 20107 OA The interval does not support this ciaim This is because 243% s not in the interval and all values are above 24%

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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The 2017 Chapman University Survey of American Fears asked a random sample of 1207 American aduts they believed that alens had come to Earth in modem times, and 20% responded yes. Complete parts (a) through (d) below a What es the standard emor tor ths estmate of the peroentage ot a Amencans who Deeve that aens have come to tam n mooern smes? Round to four decimal places as needed.) b. Find a 90% confidence interval for the proportion of all Americans who believe that alens have come to Earth in modem time (Round to two decimal places as needed.) c. What is the margin of error for the 0% confidence interval S (Round to two decimal places as needed) d Suppose that a similar poll conducted in 2016 found that 24.3% of Americans believed alens have come to Earth in modem imes. Baned on your cortdence interval, can you conclude that the proportion of Americans who believe this has increased sinoe 20107 OA. The interval does not support this claim. This is because 24.3% is not in the interval, and al values are above 24.%
Transcribed Image Text:The 2017 Chapman University Survey of American Fears asked a random sample of 1207 American aduts they believed that alens had come to Earth in modem times, and 20% responded yes. Complete parts (a) through (d) below a What es the standard emor tor ths estmate of the peroentage ot a Amencans who Deeve that aens have come to tam n mooern smes? Round to four decimal places as needed.) b. Find a 90% confidence interval for the proportion of all Americans who believe that alens have come to Earth in modem time (Round to two decimal places as needed.) c. What is the margin of error for the 0% confidence interval S (Round to two decimal places as needed) d Suppose that a similar poll conducted in 2016 found that 24.3% of Americans believed alens have come to Earth in modem imes. Baned on your cortdence interval, can you conclude that the proportion of Americans who believe this has increased sinoe 20107 OA. The interval does not support this claim. This is because 24.3% is not in the interval, and al values are above 24.%
d. Suppose that a similar pol conducted in 2016 found that 24.3% of Americans beleved aliens have come to Earth in modern times. Based on your confidence interval, can you condude that the proportion of Americans who believe this has increased since 20167 OA. The interval does not support this claim. This is because 24.3% is not in the interval, and all values are above 243 OB. The interval supports this claim. This in because 24 3% is not in the interval, and all values are above 24.% OC. The interval does not support this claim This is because 24 3% is in the interval. OD. The interval supports this claim This is because 24,3% is in the interval
Transcribed Image Text:d. Suppose that a similar pol conducted in 2016 found that 24.3% of Americans beleved aliens have come to Earth in modern times. Based on your confidence interval, can you condude that the proportion of Americans who believe this has increased since 20167 OA. The interval does not support this claim. This is because 24.3% is not in the interval, and all values are above 243 OB. The interval supports this claim. This in because 24 3% is not in the interval, and all values are above 24.% OC. The interval does not support this claim This is because 24 3% is in the interval. OD. The interval supports this claim This is because 24,3% is in the interval
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