How many variables are there?
Researchers1 asked parents of 19 American children, ages 8 to 12, to complete surveys on the number of hours their children spent reading and on the number of hours they spent on screen-based media time. Each of the children also underwent magnetic resonance imaging to assess connectivity in the brain. More time spent reading was associated with higher connectivity,while more screen time was associated with lower connectivity in the brains of the children.
1. Horowitz-Kraus T and Hutton J, “Brain connectivity in children is increased by the time they spend reading books and decreased by the length of exposure to screen-based media,”
How many variables are there?
3 variables are there
variables is a characteristic or a attribute that varies across all unit
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Identify each of the variables as quantitative or categorical. Also, identify each of the variables as an explanatory variable or a response variable.
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