To determine if their 1.00 inch copper wires are properly adjusted, Sandler Industries has decided to use an x-Chart which uses the range to estimate the variability in the sample. Table Control Chart Step 5 of 7 : Use the following sample data, taken from the next time period, to determine if the process is "In Control" or "Out of Control". Observations: 1.08,1.07,1.06 Sample Mean: 1.07