13. In a survey about the safety of air travel, 69% of the 1044 surveyed from the United States said that they consider air travel to be safe. a) Define p and p for this problem. Which is the one that we will estimate a confi- dence interval? Which is the one that we know from the survey and what is it? b) Find a 95% confidence interval for the population proportion of people that think U.S. air travel is safe. c) From this survey, can we be 95% confident that the majority of people think that U.S. air travel is safe?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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13. In a survey about the safety of air travel, 69% of the 1044 surveyed from the
United States said that they consider air travel to be safe.
a) Define p and p for this problem. Which is the one that we will estimate a confi-
dence interval? Which is the one that we know from the survey and what is it?
b) Find a 95% confidence interval for the population proportion of people that think
U.S. air travel is safe.
c) From this survey, can we be 95% confident that the majority of people think that
U.S. air travel is safe?
Transcribed Image Text:13. In a survey about the safety of air travel, 69% of the 1044 surveyed from the United States said that they consider air travel to be safe. a) Define p and p for this problem. Which is the one that we will estimate a confi- dence interval? Which is the one that we know from the survey and what is it? b) Find a 95% confidence interval for the population proportion of people that think U.S. air travel is safe. c) From this survey, can we be 95% confident that the majority of people think that U.S. air travel is safe?
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