I'm not sure how to create a control chart for this data set . The limits are 96 and 104 and I need to see if it's capable at the 2- sigma level. How do I create a control chart for this?

Day Reading 101.06 99.05 97.77 100.00 99.02 101.80 99.68 98.11 101.38 10 99.18 11 100.32 12 101.91 13 99.36 14 97.77 15 105.00 16 100.95 17 96.61 18 100.32 19 99.89 20 102.58