Question

What is a possible lurking variable (Z) that can explain the correlation between TV watching and blood pressure

Answer 1

Watching Television excessively boosts the lethargy and lowers your time to indulge in some healthy activities.

In the longer run, watching more television caused the risk of high blood pressure.

Watching excessive Television also leads to weight gain especially aorund middle area which is directly related to the risk of high blood pressure.

Answer 2

Watching excessive television increase our weight, and affect the level of cholesterol, due to which there is more chances or risk of high blood pressure.