You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30 bacteria reveals a sample mean of ¯x=76 hours, with a standard deviation of s=6.4hours.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 99% 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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Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

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Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: Solution: Given data: Preliminary Sample size = 40 Sample mean = 72 Standard deviation  = 6.4 Margin…

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Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: Solution: From the given information, confidence level is 0.90, s=5 hours and E=0.4 hours.

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A: Solution: From the given information, confidence level is 0.95, σ=61.7 and E=1.

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Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: Answer:- Given, Sample mean, x¯ = 72  Sample standard deviation, S = 5  Margin of error (E) = 0.45…

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