The higher the temperature the less dense something is. Temperature is the measurement of the average kinetic energy of the particles in the substance. let us consider water as the temperature lower then it forms ice and it's density will be lower than the density of water so that temperature is directly proportional to the density
Due to thermal expansion, as temperature increases, density decreases.
33% is about how many people who smoke will develop lung cancer over their lifetimes. And that comes with great variability and does not account for other smoking related illness. What would the data using a preliminary estimate of .33 be measuring exaxctly?