A Researcher Is Interested in the Effects of Teaching Styles

question 31

Multiple Choice

A researcher is interested in the effects of teaching styles on learning. She randomly assigns students to either a lecture-based class taught at 8:00 a.m. or a discussion-based class taught at 2:00 p.m. Her results reveal that students in the discussion-based class performed better than those in the lecture-based class. In this example the time that the class is taught could be considered an) ________variable, making it impossible to establish a causal connection between teaching method and classroom performance.

• A) independent
• B) dependent
• C) extraneous
• D) mediating

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Definitions:

Assignable Causes

Factors in a production process that can be identified and eliminated, known for causing variations in statistical process control.

Mean Charts

Graphical representations used in statistical process control that plot the mean values of a series of measurements over time.

Range Charts

Tools used in statistical process control that display the range of variability in a process over time.

Process Dispersion

The variability or spread in the process output, often resulting from differences in materials, equipment, or operating conditions.