I have been greatly enjoying your series of articles.
Another way to track the temperature data when 15 measurements form a subgroup is to use a 3-D X & MR chart. The standard deviation of the 15 readings is plotted on the bottom (S) chart, the average of the 15 on the top (X) chart, and the moving range of two consecutive averages (Xs) on the middle (MR) chart.
Take care and keep writing these interseting, and timely, articles!
Hi Doug,
I have been greatly enjoying your series of articles.
Another way to track the temperature data when 15 measurements form a subgroup is to use a 3-D X & MR chart. The standard deviation of the 15 readings is plotted on the bottom (S) chart, the average of the 15 on the top (X) chart, and the moving range of two consecutive averages (Xs) on the middle (MR) chart.
Take care and keep writing these interseting, and timely, articles!
Davis Bothe