Consuela Wants to Run an Experiment Testing the Effects of Time

question 37

Multiple Choice

Consuela wants to run an experiment testing the effects of time of day on cognitive ability.Consuela is the experimenter for all the participants randomly assigned to the "morning" condition,and her research assistant Rick is the experimenter for the "evening" condition.What is the confound in this study?

• A) cognitive ability
• B) time of day
• C) gender of the experimenter
• D) random assignment of participants

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Definitions:

Z-score

A statistical measurement that describes a value's relationship to the mean of a group of values, normalized to standard deviation units.

Normal Random Variable

A variable that follows a normal distribution, characterized by its mean and standard deviation, representing outcomes with a probabilistic nature.

Standard Deviation

An assessment of the extent to which values in a set are dispersed or varied from the mean, highlighting the differences from the average.

Z-score

A statistical measure that describes the position of a data point in terms of standard deviations from the mean.