For Joan's Doctoral Dissertation Experiment,15 Wheelchair Users Were Randomly Assigned

question 37

Multiple Choice

For Joan's doctoral dissertation experiment,15 wheelchair users were randomly assigned to three groups with 5 in each group.These participants navigated in virtual-reality settings.Group 1 participants were in the virtual-reality setting (a building) as wheelchair users.Group 2 participants were in the virtual-reality setting in a wheelchair pushed by a walking person.Group 3 participants walked without aid in the virtual-reality setting.Joan measured the time each participant needed to complete the navigation of the virtual-reality setting.What are the dependent and independent variables?

• A)Independent = wheelchair use;dependent = virtual-reality condition
• B)Independent = wheelchair use;dependent = time needed
• C)Independent = time needed;dependent = virtual-reality condition
• D)Independent = virtual-reality condition;dependent = time needed

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Definitions:

Population Variance

A measure of the spread of a population’s data points, indicating the average of the squared differences from the mean.

Chi-square Distribution

A statistical distribution used in hypothesis testing that is applicable when testing hypotheses about categorical variables.

Population Variance

A measure of the spread or distribution of a set of data values within an entire population.

Confidence Interval

A selection of values, extracted from sample analyses, believed to encompass the value of an unseen population parameter.