1. In a finishing company, 5 samples for every 20 hours are taken in order to make fabric thickness tests. Based on the data, draw the X-R control chart and draw the average values on the chart.(c1) 1. In a finishing company, 5 samples for every 20 hours are taken in order to make fabric thickness tests. Based on the data, draw the X-R control chart and draw the average values on the chart.(c1)