A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She plans to use statistical methods to estimate the mean of the population of relief times. She believes that the population is normally distributed with a standard deviation of 22 minutes. How large a sample should she take to estimate the mean time to within 4 minutes with 91% confidence? Sample Size =

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 4GP
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A medical researcher wants to investigate the amount
of time it takes for patients' headache pain to be
relieved after taking a new prescription painkiller. She
plans to use statistical methods to estimate the mean
of the population of relief times. She believes that the
population is normally distributed with a standard
deviation of 22 minutes. How large a sample should
she take to estimate the mean time to within 4
minutes with 91% confidence?
Sample Size =
Transcribed Image Text:A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She plans to use statistical methods to estimate the mean of the population of relief times. She believes that the population is normally distributed with a standard deviation of 22 minutes. How large a sample should she take to estimate the mean time to within 4 minutes with 91% confidence? Sample Size =
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