Janice Wishes to Ensure That She Has Equal Numbers of Freshmen

question 51

Multiple Choice

Janice wishes to ensure that she has equal numbers of freshmen, sophomores, juniors, and seniors in her sample. She separates the population into subpopulations according to class rank and draws random samples from each subpopulation. Janice has engaged in ___________ sampling.

• A) convenience
• B) replacement
• C) stratified random
• D) non-random

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Definitions:

Margin of Error

The amount of error allowed in the results of a poll or survey, reflecting the confidence in the results.

Observations

Data collected during an experiment or research which are analyzed to gain insights and draw conclusions.

Confidence Intervals

A gamut of values, developed from the statistics of a sampling, with a high chance of containing the value of an unknown population parameter.

Interval Center

Refers to the midpoint of an interval, representing the average of its upper and lower bounds.