The technology underlying hip replacements has changed as these operations have become more popular (over 250,000 in the United States in 2008). Starting in 2003, highly durable ceramic hips were marketed. Unfortunately, for too many patients the increased durability has been counterbalanced by an increased incidence of squeaking. An article reported that in one study of 149 individuals who received ceramic hips between 2003 and 2005, 8 of the hips developed squeaking. Calculate a lower confidence bound at the 95% confidence level for the true proportion of such hips that develop squeaking. (Round your answer to three decimal places.)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The technology underlying hip replacements has changed as these operations have become more
popular (over 250,000 in the United States in 2008). Starting in 2003, highly durable ceramic hips
were marketed. Unfortunately, for too many patients the increased durability has been
counterbalanced by an increased incidence of squeaking. An article reported that in one study of
149 individuals who received ceramic hips between 2003 and 2005, 8 of the hips developed
squeaking.
Calculate a lower confidence bound at the 95% confidence level for the true proportion of such hips
that develop squeaking. (Round your answer to three decimal places.)
Transcribed Image Text:The technology underlying hip replacements has changed as these operations have become more popular (over 250,000 in the United States in 2008). Starting in 2003, highly durable ceramic hips were marketed. Unfortunately, for too many patients the increased durability has been counterbalanced by an increased incidence of squeaking. An article reported that in one study of 149 individuals who received ceramic hips between 2003 and 2005, 8 of the hips developed squeaking. Calculate a lower confidence bound at the 95% confidence level for the true proportion of such hips that develop squeaking. (Round your answer to three decimal places.)
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