Question: In Pearson's correlation, when correlating treadmill time (a test of physical endurance) and body mass index, you have to consider the assumption of bivariate normality.

In Pearson's correlation, when correlating treadmill time (a test of physical endurance) and body mass index, you have to consider the assumption of bivariate normality. Please explain what bivariate normality is in this example correlation of treadmill time vs. body mass index? Please use complete sentences

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