You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of = 76 hours with a standard deviation of s = 7 hours. You | would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.55 hours at a 90% level of confidence. What sample size should you gather to achieve a 0.55 hour margin of error? Round your answer up to the nearest whole number. bacteria

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of \( \bar{x} = 76 \) hours with a standard deviation of \( s = 7 \) hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.55 hours at a 90% level of confidence.

What sample size should you gather to achieve a 0.55 hour margin of error? Round your answer up to the nearest whole number.

\( n = \) ___ bacteria
Transcribed Image Text:You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of \( \bar{x} = 76 \) hours with a standard deviation of \( s = 7 \) hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.55 hours at a 90% level of confidence. What sample size should you gather to achieve a 0.55 hour margin of error? Round your answer up to the nearest whole number. \( n = \) ___ bacteria
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