Explain How Scientists Have Determined That Only ~5 Percent of Mass

question 57

Essay

Explain how scientists have determined that only ~5 percent of mass and energy in the universe is "ordinary" or "normal" matter.

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Definitions:

Interaction Effect

Occurs in an analysis when the effect of one independent variable on a dependent variable differs across levels of another independent variable.

Mean Square

The average of the squares of the deviations or differences from the mean, often used in variance and regression analysis.

Within-Group Variance

The measure of how much the data points in a single group vary or deviate from the mean of that group.

Mean Square

Mean square is a statistical measure used in variance and regression analysis, representing an estimate of the variance of a dataset or the value of one variable's dependency on another.