6. As a process owner, you have been tasked with developing a x-bar chart. You've collected the following data. Calculate the upper and lower control limits using a 3-sigma performance level and build your x-bar chart. Begin by calculating the overall standard deviation and standard error. Sample Number 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 59 45 42 57 53 52 50 49 56 60 Sample Number 57 45 44 Values for Each Item in the Sample 51 41 55 57 45 57 43 57 55 48 51 47 50 40 Now, compute the upper and lower control limits using the range as your measure of variability. Finally, having built a control chart, you started to collect data, sampling three items every 30 minutes. Your data for the first five samples are shown below. Plot them on your control chart. Is your process in control? 45 47 50 40 50 45 59 49 59 49 56 41 50 Values for Each Item in the Sample 51 45 55 55 53