Question: How would you calculate mean, standard deviation and control limits as well as Plotting the coordinates on control chart. 4 August 2 0 1 9

How would you calculate mean, standard
deviation and control limits as well as
Plotting the coordinates on control chart. 4 August 2019: Value of South Africa's manufacturing sales over the last year
We take a look at the latest manufacturing production and sales numbers published by Statistics South Africa and focus on the value of sales over the last year.
\table[[No,Month,Sales values,Year on year growth],[1,Jun-18,R 191557184000,6.11%
 How would you calculate mean, standard deviation and control limits as

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