Median real estate property taxes paid for housing units with mortgages in 2013: $590 (1.2%). Median real estate property taxes paid for housing units with no mortgage in 2013: $637 (1.5%). Nearest city with pop. 50,000+: Bismarck, ND (78.6 miles, pop. 55,532). Nearest city with pop. 200,000+: Minneapolis, MN (305.7 miles, pop. 382,618).
The third type of variable is a controlled variable. This variable is constant in an experiment. Experiments are repeated a number of times to interpret how a change in the independent variable affects each trial result.
Types of Variables. Now, let's talk about those three types of variables used in scientific experiments. The first variable type is called the independent variable. This variable is the one that is manipulated or changed by the scientist.et's use an example that may assist you to understand these two types of variables. You have a plastic container with water inside. You place the container in a metal box and raise the temperature.