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A Stationary Broth Culture Contains 10 Billion (1010) Cells

question 60

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A stationary broth culture contains 10 billion (1010) cells. The microbial death rate during autoclaving of this spent culture is 1.5 minutes. How long must it be autoclaved to be considered sterile?


Definitions:

Upper Control Limit

The highest value a process variable can reach before it is considered to be out of control in a statistical quality control chart.

Sample Proportion

The ratio of members within a sample that have a particular attribute to the total number of members in the sample.

Level Shift

A sudden change in the baseline level of a time series dataset.

Cyclic Variation

Represents recurrent fluctuations in a time series data over a period longer than one year, often tied to economic, environmental, or social cycles.

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