Explanation:
To calculate the upper control limit (UCL) for a three-sigma R-Chart, you need to multiply the average range (AR) by a scaling factor. In this case, the scaling factor for a three-sigma R-Chart is 3.
Given that the average range (AR) is 8, we can calculate the UCL as follows:
UCL = AR + (3 * AR)
UCL = 8 + (3 * 8)
UCL = 8 + 24
UCL = 32
Therefore, the UCL of the R-Chart is 32 when rounded to two decimal places