Graphs

Histogram

Histogram of the data set.

Normal distributed data set

Not normal distributed data set

http://en.wikipedia.org/wiki/Histogram

Box plot

• Top whisker: Top box (Q1) + 1.5 x interquartile range (Q1-Q3)
• Top box (Q1) below this value are 75% all the data points.
• Median (Q2)
• Interquartile range 50% of all the data point are within this range.
• Bottom box (Q3) above this value are 75% of all the data points
• Bottom whisker: Bottom box (Q3) - 1.5 x interquartile range (Q1-Q3)
• o outliers between 1.5 and 3 times the interquartile range
• + extreme outliers above 3x the interquartile range

http://en.wikipedia.org/wiki/Boxplot

Time graph

Shows how the data-set behavior over time.

Legend

• Green line Nominal value
• red lines min and max tolerance borders
• light gray outliers between 1.5 and 3x the interquartile range
• Dark gray extreme outliers above 3x the interquartile range

Correlation graph

Shows graphical how the data set correlates with the comparing data set.

Legend

• light gray outliers between 1.5 and 3x the interquartile range
• Dark gray extreme outliers above 3x the interquartile range

Correlation

No correlation

Individual dot plot

Legend

Shows all individual data points. Useful when to see the influence on rounding of the data see graphs.

• light gray outliers between 1.5 and 3x the interquartile range
• Dark gray extreme outliers above 3x the interquartile range

Data file

Calculations

95% confidence interval for Mean

95% confidence interval for STDEV

To get the Confidence interval click on the graph of the data-set and it will be visible in in the graph pop-up.

Distribution fitting

Use the Distribution fitting function Tools=>Distribution fitting. The graph best Correlation is the best fitting distribution.

Data file

Control Chart

The Control Chart is used in Statistical Precess Control (SPC) to monitor a production precess.

Multiple Correlation Graph

The multiple correlation Graph is to get a fast overview of all possible correlations.

DOE response graphs

Shows the influence of the levels of each factor in the DOE.

Legend

• The black line in the graph is the mean value of the factor.
• The two gray lines are the mean plus and minus 1 STDEV to give a indication of the influence of the factor on the spread.