In such cases, the average moving range and median moving range across all subgroups are alternative ways to estimate process variation. You can create a control chart of moving …

The range is the difference between the largest and smallest data values in the sample. The range represents the smallest interval that contains all the data values.

Complete the following steps to interpret display descriptive statistics. Key output includes N, the mean, the median, the standard deviation, and several graphs.

In Range type, specify the type of range, then enter the row number or numbers to define the range. If you select Arbitrary set of rows, you can type ranges of rows with a colon.

If the process variation is not stable, then the individuals chart control limits will be questionable and the chart might show a false out-of-control signal. Use a moving range chart to determine …

For example, with the default values of K and L, a Cg metric of 2 indicates that 20% of your tolerance range will cover the entire spread of measurements twice over. This Cg value …

Interpreting Kendall's correlation coefficient Kendall's coefficient values can range from −1 to 1. A positive value indicates positive association. A negative value indicates negative association. …

Plotted points Each plotted point, ri, represents the range for subgroup i. Control limits Lower control limit (LCL) The value of the lower control limit for each subgroup is equal to the greater …

Range The range is the difference between the largest and smallest data values in the sample. The range represents the interval that contains all the data values.

Tolerance intervals are a range of values for a specific quality characteristic of a product that likely covers a specified percentage of future product output.