Box Plot — Graphical Methods — Histogram
Box plots are most useful when comparing between several data sets. They are less detailed than histograms, and take up less space which make them easier to compare.
Box Plot — Graphical Methods
Box plots can tell if the distribution is symmetrical or skewed. In a symmetric distribution, the mean and median are nearly the same, and the two whiskers has almost the same length.
Box Plot — Graphical Methods — Sampling
Box plots are ideal to represent moderate to large amount of data. The size of the box plot can vary significantly if the data size is small.
Box Plot — Graphical Methods —Minitab
The following are boxplots that display the yield of a crop after applying two different fertilizers. Fertilizer 2 appears to have a higher yield than Fertilizer 1.
Box Plot — Graphical Methods —Minitab
This example shows that females have higher glucose levels than males in a workplace. ANOVA can be used here to test the significance of the difference between the two means.
Histogram — Box Plot — Graphical Methods
Both histograms and boxplots allow to visually assess the central tendency, the amount of variation in the data as well as the presence of gaps, outliers or unusual data points.
Histogram — Box Plot — Minitab — Graphical Methods
Many statistical applications allow the option of summarizing your data graphically. This can reveal unusual observations before performing detailed statistical analysis.
Scatter Diagram — Correlation — Graphical Methods
Scatter diagrams can indicate several types of correlation.
Scatter Diagram — Stratification — Graphical Methods — Correlation
You can indicate a stratification factor in the scatter diagram.
Scatter Diagram — Correlation — Graphical Methods
No correlation does not mean there is no cause-and-effect relationship. There might be a relationship over a wider range of data.
Scatter Diagram — Minitab - Graphical Methods
This is an analysis that shows the relationship between two variables. The scatter diagram suggests that the two variables are correlated. (Data source: Minitab Inc)
Scatter Diagram — Minitab - Graphical Methods
This analysis was conducted for diagnosing the presence of diabetes at a workplace. It suggests that there is no obvious relationship between age and glucose levels.
Scatter Diagram — Matrix Plot — Minitab - Graphical Methods
In this matrix plot, it appears that there is a positive relationship between the years of experience and salaries. (Data source: Minitab Inc)
Value Stream Map — Product Family Matrix
This is an example of a product family matrix which can help choosing the product or family of products that will be of most value.
Value Stream Map — Symbols
Value stream mapping uses a set of symbols to denote the various details. These are the basic symbols that are applicable in most situations.

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