Professor McSpell Designed an Experiment to Test Her Hypothesis That

question 8

Multiple Choice

Professor McSpell designed an experiment to test her hypothesis that exercise will increase spelling ability.She divided children into three groups and had one group do 10 minutes of exercises,one group do 30 minutes of exercises,and the third group do no exercise.She then tested all three groups of children to see how many words they could spell correctly on a spelling test.In this experiment,the scores on the spelling test serve as the

• A)dependent variable.
• B)independent variable.
• C)control group.
• D)reliability measure.

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Definitions:

Confidence Interval

A statistical range, based on sample data, within which there is a specified probability that the value of a parameter lies.

Normal Curve

A symmetrical, bell-shaped curve that represents the distribution of many types of data in which most values cluster around a mean value.

Curvilinear Relationship

A relationship between two variables that, if plotted out, will show a curve rather than a straight line.

Inferential Statistics

A field within statistics that employs a random sample from a larger population to describe and draw conclusions about that population.