Which has greater air pressure, warm or cold air?

Question

Which has greater air pressure, warm or cold air?

Answer 1

Atmospheric air pressure is the weight of the overlying column of air(of unit area)over a place measured at a particular level . Cold air is denser than warm air and hence has more weight.So,a column of cold air will have more weight and therefore more pressure.

Answer 2

Cold air is more dense than warm air.  There are more molecules of cold air contained within a given volume.