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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:A poll of 2657 U.S. adults found that 86% regularly
used Facebook as a news source.
Find the margin of error and confidence interval
for the percentage of U.S. adults who regularly use
Facebook as a news source, at the 90% level of
confidence. Round all answers to 2 decimal places.
Margin of Error (as a percentage):
Confidence Interval:
Find the margin of error and confidence interval
for the percentage of U.S. adults who regularly use
Facebook as a news source, at the 95% level of
confidence. Round all answers to 2 decimal places.
Margin of Error (as a percentage):
Confidence Interval:
Find the margin of error and confidence interval
for the percentage of U.S. adults who regularly use
Facebook as a news source, at the 99% level of
confidence. Round all answers to 2 decimal places.
Margin of Error (as a percentage):
Confidence Interval:
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- In a recent poll, 450 people were asked if they liked dogs, and 54% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.arrow_forwardA research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=935 and x=561 who said "yes." Use a 95% confidence level.arrow_forwardyou want to find out the percent of people who use an iPhone so you survey 120 random adults of whom 57 use an iPhone. what is the 95% confidence interval for P the put portion of all adults who use iPhonearrow_forward
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- In a recent poll, 350 people were asked if they liked dogs, and 41% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.arrow_forwardA successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?arrow_forwardjust the multiple choice part thank you!arrow_forward
- Please answer a, b, and darrow_forwardIn a recent poll, 490 people were asked if they liked dogs, and 90% said they did. Find the Margin of Error for this poll, at the 99% confidence level. Give your answer to four decimal places if possible.arrow_forwardPlease find Construct the 80% confidence interval. Step by step Based on the confidence interval, is it reasonable to believe that the proportion of college graduates among women who work at home is the same as the proportion of college graduates among men who work at home? Explain.arrow_forward
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