5.1. Descriptive Statistics

• Summary Statistics
• Confidence Intervals
• Quantiles (Percentiles)
• Sample Statistics
• Frequency Distributions
• Stem and Leaf Plot
• Sequence Diagram
• Scatter Diagram

Summary Statistics, Confidence Intervals and Quantiles (Percentiles) are multisample procedures that work with continuous and categorical data. The Quantiles (Percentiles) procedure enables you to calculate any quantile values (or percentiles) with their confidence intervals for up to nine quantiles at a time. Six alternative quantile methods and four confidence interval methods are provided.

Sample Statistics procedure provides a wide range of statistics for frequency and grouped data, as well as continuous data. The Frequency Distributions procedure works on the same types of data and allows for selecting lower and upper bounds and class intervals. Its output can be displayed in the form of a Table or a Character Histogram. Four types of character plots, namely, histograms, stem and leaf plots, sequence and scatter diagrams, can be drawn.