You are a researcher studying the lifespan of a certain species of bacteria.A preliminary sample of 35 bacteria reveals a sample mean ofx = 80 hours with a standard deviation ofs = 4.2 hours.You would like to estimate the mean lifespan for this species of bacteriato 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 answerupto the nearest whole number.

n =________bacteria