39 A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30 bacteria reveals a sample mean of \( \bar{x} = 64 \) hours with a standard deviation of \( s = 4.8 \) hours. He would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.4 hours at a 90% level of confidence.What sample size should you gather to achieve a 0.4 hour margin of error?He would need to sample [ ] bacteria.

Name: 39 A researcher studying the lifespan of a certain species of bacteria
Uploaded: 2024-03-20T07:06:41.000Z
Channel: Bartleby
Description: 39 A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30 bacteria reveals a sample mean of \( \bar{x} = 64 \) hours with a standard deviation of \( s = 4.8 \) hours. He would like to estimate the mean lifespa