Hey everyone, welcome to the activity solutions lecture. To create a rank chart. Please copy and paste this data in Minitab. Choose stat, quality tools, rank chart, I repeat, choose stat, quality tools, rank chart. In single column, enter life in minutes of a catalyst in subgroup size, enter one. Click ok.

This is the rank chart. Oh my god. This chart shows some kind of a trend. Let's look at the P values of clustering. Make sure strains and oscillations. The P value for clustering and trains is less than 0.05 indicating that the data has clusters and also shows some kind of a trend.

The P value for mixtures and oscillations is greater than 0.05. Since the P values of clusters, mixture strains and oscillations, all of these four factors is not more than 0.05. The given data is concluded to be unstable. Before beginning to analyze the data and identifying inferences, the analyst would need to wait until the data gained stability