Statistical tests are run
to determine if the results obtained with a sample of the population
can be applied to the entire population. We make an inference about
the population. In order to make an inference, we run a statistical
Studies typically are done
with a sample of the entire population.
We try a weight loss program
with 50 college females, not all college females in the world. But
we want the results of our study to be applied to all adults. How
can we do this?
We can run a statistical test
to make a decision, estimation, prediction, or generalization about
the population based on information from our sample. This is called