How Did Robert Koch Determine That It Was Bacteria That

question 41

Multiple Choice

How did Robert Koch determine that it was bacteria that caused the disease anthrax?

• A) Everybody at the time knew anthrax was caused by bacteria.
• B) He injected mice with anthrax infected material, and they all came down with anthrax, while those injected with healthy material did not.
• C) He put mice in close proximity to healthy and to anthrax-infected animals and only those near the sick animals contracted anthrax.
• D) He photographed the anthrax bacteria.
• E) He infected himself with anthrax bacteria and contracted the disease.

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Definitions:

Sampling Error

The difference between a sample statistic and the corresponding population parameter, which arises simply because the sample is not a perfect representation of the population.

Population

Total number of possible units or elements that could potentially be included in a study.

Statistics

Branch of mathematics dealing with the collection, analysis, interpretation, and presentation of masses of numerical data.

Null Hypothesis

A formal statement that assumes no association or effect between variables, serving as the basis for statistical significance testing.