Use the following confidence level interval limits to find the point estimate 
and
the margin of error E .
-Medical researchers, studying cochlear implants, devices placed behind the bone in the ear to improve hearing, find confidence interval of the mean number of implants over the past 12 years from 186.9 to 408 actually does contain the true value of 
.
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Q1: Find the minimum sample size required to
Q18: Use the following confidence level interval limits
Q19: Find the minimum sample size required to
Q20: Use the following confidence level interval limits
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Q23: For the next questions, assume that a
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