To access the information that you are interested in, select the topic from the Tutorial outline. At the end of each section is hypertext to enable a user to jump to any section of the tutorial, or if they wish, they can continue on to the next section by scrolling down. Run charts are useful in discovering patterns that occur over time.
Trends are patterns or shifts according to time.
An upward trend, for instance, would contain a section of data points that increased as time passed. A population is the entire data set of the process. If a process produces one thousand parts a day, the population would be the one thousand items. A sample is a subgroup or small portion of the population that is examined when the entire population can not be evaluated. For instance, if the process does produce one thousand items a day, the sample size could be perhaps three hundred.