How is the proportion of variance accounted for calculated?
a. It is the same as the point-biserial correlation coefficient.
b. It is the square root of the point-biserial correlation coefficient.
c. It is the squared point-biserial correlation coefficient.
d. It is the slope and intercept of the regression line.
Question 2
In an experiment, the proportion of variance accounted for is also called the
a. effect size.
b. error reduction coefficient.
c. confidence interval.
d. standard error of the difference between means.
Lake position in the landscape and proportion of water received as groundwater (data from Webster et
Example of variance documentation
The proportion of obese and extremely obese adults in the United States has increased over the past
Leonardo da Vinci, Study of Human Proportion: The Vitruvian Man.
U.S. adults from 25 to 74 years report that the largest proportion of their daily stressors arise ...
The Means and Extremes of a Proportion