If Estimates of an Extinction Rate of 1% Per Year

question 79

Multiple Choice

If estimates of an extinction rate of 1% per year are correct, what percentage of all species will be extinct by the end of this century?

• A)10%
• B)25%
• C)33%
• D)50%
• E)66%

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Definitions:

P-Value

The possibility of encountering test findings at least as significant as the observed results, assuming the validity of the null hypothesis.

Normal Distribution

A bell-shaped distribution that is symmetric about the mean, where data near the mean are more frequent in occurrence than data far from the mean.

Sample

A subset of individuals from within a larger population used to approximate characteristics of the whole population.

Poisson Probabilities

The likelihood of a given number of events happening in a fixed interval of time or space, assuming the events occur with a known constant mean rate and independently of the time since the last event.