How does one variable affects another happens in what

Interaction effects occur when the effect of one variable depends on the value of another variable. Interaction effects are common in regression analysis, ANOVA, and designed experiments. ... Interaction effects indicate that a third variable influences the relationship between an independent and dependent variable.

Variables. An experiment generally tests how one variable is affected by another. The affected variable is called the dependent variable. ... In any experiment, other factors that might affect the dependent variable must be controlled.

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the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle