Exact or even close population counts are not known. It is thought that Pompeii had a population somewhere between 12,000 and 15,000 and Herculaneum a population between 4,000 and 5,000. Very few remains have been found within Herculaneum. Most of the remains have been found on the beach.
Independence. An independent variable is one is manipulated by the researcher. It is like the knob on a dial that the researcher turns. In graphs, it is put on the X-axis. A dependent variable is one which changes as a result of the independent variable being changed, and is put on the Y-axis in graphs.ndependence. An independent variable is one is manipulated by the researcher. It is like the knob on a dial that the researcher turns. In graphs, it is put on the X-axis. A dependent variable is one which changes as a result of the independent variable being changed, and is put on the Y-axis in graphs.
The independent variable is independent because its variation does not depend on the variation of another variable in the experiment/research project. The independent variable is controlled or changed only by the researcher. This factor is often the research question/hypothesis behind the outcome of the experiment. In the above example, the researcher may have wanted to see if participating in the training program raised students' scores on a final test.