In 2015, there were approximately 31,200 firearm fatalities. express this quantity in deaths per hour

r-squared or r

Step-by-step explanation:

The statistic that would enable the experimenter determine if there is a relationship between hyperactivity and the consumption of these food dyes is "r-squared or r"

r-squared is a statistical measure used to represent the proportion of the variance for a dependent variable when compared or explained by an independent variable. the variables in this experiment are the food dyes and hyperactivity and to measure the proportion of variance of the dependent variable when explained by an independent variable, r-squared or r is used .