1 A ratio variable, has all the properties of an interval variable, and also has a clear definition of 0.0. 2  When the variable equals 0.0, there is none of that variable. 3  Variables like height, weight, enzyme activity are ratio variables.4  Temperature, expressed in F or C, is not a ratio variable. A ordinal variable, is one where the order matters but not the difference between values. 2  For example, you might ask patients to express the amount of pain they are feeling on a scale of 1 to 10. 3  A score of 7 means more pain that a score of 5, and that is more than a score of 3.
Also be sure a hole has not been punched in the bellows as this will cause a vacuum leak. The second thing that causes breaker to blow is simply an old worn out electric pump motor, especially in salt water applications. The third cause is that the holding tank is full and the vent line is plugged.
Despite the fact that it is a solvent, high concentrations of glycerin can cause clogged pores on rare occasions. This is usually due to a reaction that leaves the pores constricted and thus more prone to clog.However, glycerin is soluble in both water and alcohol, so clogging is abnormal and quite rare.his can be anything from moisturizer, cleanser, toner, makeup, to hair products and laundry detergent. Anything that touches your skin is a potential clogged pore culprit. Clogged pores can take up to 2 weeks to show up on your skin, so something you used several weeks ago (3-6 weeks) could have caused that reaction.