A Newspaper Reports That Students at an Elementary School with Fluorescent

question 121

Multiple Choice

A newspaper reports that students at an elementary school with fluorescent lighting have lower achievement scores than children at a nearby school with incandescent lighting.The newspaper urges a change to incandescent lighting at the first school.This is unwarranted because

• A)it is based upon case study.
• B)field experiments cannot be generalized.
• C)there was no extraneous variable in the experiment.
• D)it confuses correlation and causation.

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Definitions:

Sample Data

A subset of individuals or observations taken from a larger population, used to estimate characteristics of the whole population.

Percentages

Numerical values expressed as a fraction of 100, used to describe proportions or ratios.

Significance Level

A threshold of probability set before an experiment to determine the acceptability of the evidence against the null hypothesis.

Student Body Proportions

The ratio or percentages of various groups within a school or college’s enrollment, such as by gender or race.