Evidence from Polar Ice Core Analysis Shows That,until Now,global Carbon

question 21

Multiple Choice

Evidence from polar ice core analysis shows that,until now,global carbon dioxide levels have never exceeded ______________ ppm in the last 800,000 years.

• A)25
• B)300
• C)200
• D)1000
• E)500

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Definitions:

Central Limit Theorem

A statistical theory that states that given a sufficiently large sample size from a population with a finite level of variance, the mean of all samples from the same population will be approximately equal to the mean of the population.

Sample Mean

The average value of a sample subset of a larger population, used as an estimate of the population mean.

Point Estimate

A single value estimate for a population parameter derived from a sample.

Population Mean

The average value of a population's characteristics.