An article describes several studies of the failure rate of defibrillators used in the treatment of heart problems. In one study conducted by the Mayo Clinic, it was reported that failures were experienced within the first 2 years by 11 of 93 patients under 50 years old and 14 of 354 patients ages 50 and older who received a particular type of defibrillator. Assume it is reasonable to regard these two samples as representative of patients in the two age groups who receive this type of defibrillator. A USE SALT (a) Construct a 95% confidence interval for the proportion patients under S0 years old who experience a failure within the first 2 years after receiving this type of defibrillator. (Round your answers to three decimal places.) Interpret the interval. O we are 95% confident that the proportion of all patients under 50 years old who experience a failure within the first two years after receiving this type O we are confident that 95% of all patients under 50 years old who experience a failure within the first two years after receiving this type of defibrillator are within this interval. O we are 95% confident that the proportion of all patients who experience a failure after receiving this type of defibrillator is within this interval. defibrillator is within this interval. O we are confident that the proportion of all patients under 50 years old who experience a failure within the first two years after receiving this type of defibrillator is within this interval at least 95% of the time. (b) Construct a 99% confidence interval for the proportion of patients ages 50 and older who experience a failure within the first 2 years after receiving this type of defibrillator. (Round your answers to three decimal places.) Interpret the interval. O we are confident that 99% of all patients ages 50 or older who experience a failure within the first two years after receiving this type of defibrillator is within this interval. O we are 99% confident that the proportion of all patients who experience a failure after receiving this type of defibrillator is within this interval. O we are confident that the proportion of all patients ages 50 or older who experience a failure within the first two years after receiving this type of defibrillator is within this interval at least 99% of the time. O we are 99% confident that the proportion of all patients ages S0 or older who experience a failure within the first two years after receiving this type of defibrillator is within this interval. (c) Suppose that the researchers wanted to estimate the proportion of patients under ! results of the study as a preliminary estimate of the population proportion. (Round your answer up to the nearest whole number.) years old who experience a failure within the first 2 years after receiving this type of defibrillator to within 0.03 with 95% confidence. How large a sample should be used? Use the patients

An article describes several studies of the failure rate of defibrillators used in the treatment of heart problems. In one study conducted by the Mayo Clinic, it was reported that failures were experienced within the first 2 years by 11 of 93 patients under 50 years old and 14 of 354 patients ages 50 and older who received a particular type of defibrillator. Assume it is reasonable to regard these two samples as representative of patients in the two age groups who receive this type of defibrillator. A USE SALT (a) Construct a 95% confidence interval for the proportion patients under S0 years old who experience a failure within the first 2 years after receiving this type of defibrillator. (Round your answers to three decimal places.) Interpret the interval. O we are 95% confident that the proportion of all patients under 50 years old who experience a failure within the first two years after receiving this type O we are confident that 95% of all patients under 50 years old who experience a failure within the first two years after receiving this type of defibrillator are within this interval. O we are 95% confident that the proportion of all patients who experience a failure after receiving this type of defibrillator is within this interval. defibrillator is within this interval. O we are confident that the proportion of all patients under 50 years old who experience a failure within the first two years after receiving this type of defibrillator is within this interval at least 95% of the time. (b) Construct a 99% confidence interval for the proportion of patients ages 50 and older who experience a failure within the first 2 years after receiving this type of defibrillator. (Round your answers to three decimal places.) Interpret the interval. O we are confident that 99% of all patients ages 50 or older who experience a failure within the first two years after receiving this type of defibrillator is within this interval. O we are 99% confident that the proportion of all patients who experience a failure after receiving this type of defibrillator is within this interval. O we are confident that the proportion of all patients ages 50 or older who experience a failure within the first two years after receiving this type of defibrillator is within this interval at least 99% of the time. O we are 99% confident that the proportion of all patients ages S0 or older who experience a failure within the first two years after receiving this type of defibrillator is within this interval. (c) Suppose that the researchers wanted to estimate the proportion of patients under ! results of the study as a preliminary estimate of the population proportion. (Round your answer up to the nearest whole number.) years old who experience a failure within the first 2 years after receiving this type of defibrillator to within 0.03 with 95% confidence. How large a sample should be used? Use the patients

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Description: An article describes several studies of the failure rate of defibrillators used in the treatment of heart problems. In one study conducted by the Mayo Clinic, it was reported that failures were experienced within the first 2 years by 11 of 93 patien

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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