Coral Reefs Are

question 42

Multiple Choice

Coral reefs are

• A)shells of Mollusca that have been converted to rock by geological processes.
• B)marine rocks that often are used as attachment places by Cnidaria.
• C)hard external skeletons secreted by coral animals (Cnidaria).
• D)hardened sugars that are secreted by algae.

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Definitions:

Critical Values

Specific points along the scale of a test statistic that delineate the acceptance or rejection of the null hypothesis.

Two-Tailed Hypothesis

A statistical test where the area of interest lies in both tails of the distribution, testing for the possibility of a relationship in both directions.

Level of Significance

A threshold used to decide whether a hypothesis test results are statistically significant.

Standard Error

Refers to the standard deviation of the sampling distribution of a statistic, often used as an estimate of the precision of a sample mean or proportion.