St. Pius X High School
Quantitative or Qualitative data
Quantitative Data: Measurement itself is usually displayed. Measurement scale should be consistent.
Qualitative Data: Frequency or percentage of occurrence is usually displayed.
What kind of data is appropriate for a Pareto Chart?
Identify the frequency of events or categories in decreasing order of frequency of occurrence
Display how a TOTAL is dispersed into several categories. Mostly for Qualitative data, or anything where the percentage of occurrence makes sense.
10 or less categories is best.
What kind of data is appropriate for a time-series graph?
Display how data change over a period of time.
Keep consistent units of time.