A research scientist wants to know how many times per hour a certain strand of bacteria...

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. The mean is found to be 13.6 reproductions and the population standard deviation is known to be 1.9 . If a sample of 189 was used for the study, construct the 85 % confidence interval for the true mean number of reproductions per hour for the bacteria. Round your answers to one decimal place.

Solutions

Expert Solution

We have given that,

Sample mean =   13.6
Population standard deviation=   1.9
Sample size=189
Level of significance =1-0.85=0.15
Z critical value (by using Z table)=1.44

Confidence interval formula is

=(13.4,13.8)

orchestra answered 1 year ago

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