Independent and Dependent Variables Kayla Observes That Textbook Publishers Use

question 68

Multiple Choice

Independent and Dependent Variables Kayla observes that textbook publishers use different methods to highlight key vocabulary terms and she questions whether this affects word recognition.She randomly assigns subjects to read the same textbook passage with key words boldfaced in black, blue, or red, in rooms with high or low illumination, and then administers a recognition test.Identify the task variable in Kayla's experiment.

• A)reading ability
• B)room illumination
• C)text color
• D)visual acuity

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Definitions:

Confidence Interval

A spectrum of figures, taken from sample observations, possibly enclosing the value of an undetermined population characteristic.

Margin Of Error

An expression of the amount of random sampling error in a survey's results, indicating the confidence in the reliability of the results.

Sample Standard Deviations

A measure that quantifies the amount of variation or dispersion of a set of data values from its sample mean.

Equal Sample Sizes

A condition in statistical analysis where the number of observations in each group being compared is the same.