What is the probability Distribution of X?
The probability distribution of the DV (in this case, X) is modeled by a Bernoulli Trial. The probality distribution of X is shown on the right in the graphic (above). You can see that on the graph both 0 and 1 have the same probability (height of the black bars). Population. Recall that the probability distribution of the DV is often called a population. In the current example this is a Bernoulli Trial. In the realm of science, when the scientists measure one volunteer it is equivalent in the statistical model to drawing a single score (X) from the population. Sampling. When the scientists running the study find and measure a sample of 10 volunteers, the statistical model summaries all that work as simply sampling 10 people from a population. In this case we can see on the above graphic that we will randomly draw 10 people from the population. This gives us a sample of 10 scores. For illustration, I have made the score of the first person (X1) equal to 1, and the score the second scor
