Not All Sponges Have Skeletons

question 43

Multiple Choice

Not all sponges have skeletons. If they do, their skeletons may be made of:

• A)silica.
• B)calcium carbonate.
• C)bone.
• D)protein.
• E)carbohydrate.

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Definitions:

Confidence Interval Estimate

An estimated range of values computed from sample data that is likely to include the true parameter of a population with a specified level of confidence.

Mean Scores

The arithmetic average of a set of scores, indicating central tendency.

Anti-drug Program

A program designed to prevent drug abuse and addiction, often through education or rehabilitation.

Democrats

A member or supporter of the Democratic Party, one of the two major political parties in the United States.