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.
Boat Holding Tank Treatments. Tired of getting on your boat after a few weeks away only to be greeted with a dire case of BBS (bad boat smell)? At Fisheries we are proud to supply a wide variety of holding tank treatment products that can help you resolve even the worst case of BBS with very little effort on your part. Following, we break down some of the options to help you decide which product will work best in your holding tank.