Keys at the Phylum (Division) Level May Not Be Completely

question 13

Multiple Choice

Keys at the phylum (division) level may not be completely practical because of which of the following?

• A) They may require chemical tests that are not easily performed.
• B) They nearly always require electron microscopes.
• C) They include so many exceptions that they become cumbersome.
• D) They mainly consist of simple listings of organisms.
• E) None of these answers are correct.

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Definitions:

Chi-Square Values

A measure in statistics that compares observed results with expected outcomes, used to determine if there are significant differences between groups.

Confidence Interval

A spectrum of numbers, generated from analyzing sample data, expected to cover the value of a not yet identified population trait.

Hypothesis Test

A statistical method that uses sample data to evaluate a hypothesis about a population parameter, determining whether there is enough evidence to reject the null hypothesis.

Rejection Region

In hypothesis testing, the range of values for which the null hypothesis is considered unlikely and is therefore rejected.