Do not round mid-calculation. However, use a critical value accurate to three decimal places. #16 Points possible: 1. Total attempts: 3 You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 40 bacteria reveals a sample mean of x? = 68 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 0.6 hours at a 99% level of confidence. What sample size should you gather to achieve a 0.6 hour margin of error? Round your answer up to the nearest whole number. n = _ bacteria
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Given that the confidence level is 99%, we need to find the z-value that corresponds to this confidence level. Using a standard normal distribution table or calculator, we find that the z-value is approximately 2.5758. Show moreā¦
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