1. Construct the range chart. Is it in control? Why or why not? ...

     For the process sample below.           Subgroup (x) 1 2 3 4 5   1 13.865 13.859 13.867 13.863 13.859   2 13.867 13.852 13.864 13.856 13.867   3 13.871 13.869 13.863 13.863 13.852   4 13.875 13.872 13.872 13.863 13.877   5 13.861 13.871 13.875 13.876 13.863   6 13.876 13.876 13.877 13.867 13.875   7 13.876 13.863 13.861 13.865 13.875   8 13.88 13.878 13.869 13.894 13.884   9 13.882 13.884 13.88 13.881 13.873   10 13.881 13.88 13.871 13.884 13.875   11 13.881 13.888 13.884 13.885 13.886   12 13.897 13.894 13.886 13.888 13.889   13 13.894 13.885 13.893 13.892 13.901   14 13.89 13.902 13.906 13.888 13.894   15 13.89 13.901 13.896 13.913 13.902   16 13.905 13.91 13.902 13.889 13.918   17 13.909 13.908 13.913 13.921 13.896   18 13.901 13.914 13.901 13.91 13.914   19 13.904 13.897 13.906 13.905 13.914   20 13.915 13.917 13.921 13.905 13.923                 1. Construct the range chart. Is it in control?   Why or why not?     2. Construct the X-bar chart. Is it in control?   Why or why not?     3. What is your recommendation?