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A microbiologist-wants to estimate the concentration of a
Chapter 4, Problem 11E(choose chapter or problem)
A microbiologist wants to estimate the concentration of a certain type of bacterium in a wastewater sample. She puts a 0.5 mL sample of the wastewater on a microscope slide and counts 39 bacteria. Estimate the concentration of bacteria, per mL, in this wastewater, and find the uncertainty in the estimate.
Questions & Answers
QUESTION:
A microbiologist wants to estimate the concentration of a certain type of bacterium in a wastewater sample. She puts a 0.5 mL sample of the wastewater on a microscope slide and counts 39 bacteria. Estimate the concentration of bacteria, per mL, in this wastewater, and find the uncertainty in the estimate.
ANSWER:
Solution
Step 1 of 2
Here we have to estimate the concentration of bacteria in a wastewater
Let X represents the bacteria in 0.5 ml
Let Represents the true concentration in one ml
Then XPoisson(0.5)
The observed value of x is 39