
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question
In a survey of
2130
adults in a recent year,
748
Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals.
The 90% confidence interval for the population proportion p is
left parenthesis nothing comma nothing right parenthesis
.
(Round to three decimal places as needed.)
The 95% confidence interval for the population proportion p is
left parenthesis nothing comma nothing right parenthesis
.
(Round to three decimal places as needed.)
With the given confidence, it can be said that the
of adults who say they have made a New Year's resolution to eat healthier is
of the given confidence interval.
▼
sample proportion
population proportion
▼
less than the upper endpoint
not between the endpoints
greater than the lower endpoint
between the endpoints
Compare the widths of the confidence intervals. Choose the correct answer below.
A.
The 90% confidence interval is wider.
B.
The 95% confidence interval is wider.
C.
The confidence intervals cannot be compared.
D.
The confidence intervals are the same width.
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