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.A research and development engineer is preparing a report for the board of directors on the battery life of a new cell phone they have produced. At a 95% confidence level, he has found that the battery life is 3.2±1.0 days. He wants to adjust his findings so that the margin of error is as small as possible. Which of the following will produce the smallest margin of error?

.A research and development engineer is preparing a report for the board of directors on the battery life of a new cell phone they have produced. At a 95% confidence level, he has found that the battery life is 3.2±1.0 days. He wants to adjust his findings so that the margin of error is as small as possible. Which of the following will produce the smallest margin of error?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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30. A research and development engineer is preparing a report for the board of directors on the battery life of a new cell phone they have produced. At a 95% confidence level, he has found that the battery life is 3.2+1.0 days. He wants to adjust his findings so that the margin of error is as small as possible. Which of the following will produce the smallest margin of error? Increase the confidence level to 100%. This will assure that there is no margin of error. Take a new sample from the population using a smaller sample size Increase the confidence level to 99% Decrease the confidence level to 90%
Transcribed Image Text:30. A research and development engineer is preparing a report for the board of directors on the battery life of a new cell phone they have produced. At a 95% confidence level, he has found that the battery life is 3.2+1.0 days. He wants to adjust his findings so that the margin of error is as small as possible. Which of the following will produce the smallest margin of error? Increase the confidence level to 100%. This will assure that there is no margin of error. Take a new sample from the population using a smaller sample size Increase the confidence level to 99% Decrease the confidence level to 90%
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