Enter your data for Xbar-R Chart

Stat > Control Charts > Variables Charts for Subgroups > Xbar-R

Select the option that best describes your data.

All measurements are in one column

Complete the following steps if the measurement data for an Xbar-R chart are in one column.

  1. From the drop-down list, select All observations for a chart are in one column.
  2. Enter one or more columns of measurement data. If you enter more than one column, Minitab creates a separate Xbar-R chart for each column.
  3. In Subgroup sizes, do one of the following:
    • If all subgroups are the same size, enter the subgroup size (for example, 5).
    • Enter a column of values that identifies which subgroup each measurement is from.
In this worksheet, Measurements contains the measurement data. Subgroup identifies which subgroup each measurement is from.
C1-T C2
Subgroup Measurements
One 10
One 13
One 10
Two 8
Two 8
Two 9

Measurements for each subgroup are in a different row

Complete the following steps if each row in the worksheet contains the measurement data for one subgroup.

  1. From the drop-down list, select Observations for a subgroup are in one row of columns.
  2. Enter the columns that contain the measurement data.
In this example, Measurement_1, Measurement_2, and Measurement_3 contain the measurement data. The data for subgroup 1 are in row 1, the data for subgroup 2 are in row 2, and so on.
C2 C3 C4
Measurement_1 Measurement_2 Measurement_3
10 13 10
8 8 9
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