Question: Four samples (k = 4) are taken from a process with each sample consisting of six observations (n = 6). The length in centimeters of

Four samples (k = 4) are taken from a process with each sample consisting of six observations (n = 6). The length in centimeters of each sampled item was measured, with the following results:

Develop an R chart to determine if the dispersion is stable or not.

Sample Obs1 Obs2 Obs3 Obs4 Obs5 Obs6 24.70 25.86 25.08 24.92 25.46 25.21 25.31 25.56 24.36 24.66 25.00 24.82 24.66 26.29 24.85 24.24 25.73 23.91 25.14 4 26.26 25.50 24.82 23.74 25.94

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