solve

3. Assume that 9 IC observations have been collected for phase II monitoring of a production process. These observations along with the first 21 phase II observations are presented below. 5.139,5.097,5.329,4.449,4.890,4.356,5.065,4.883,4.580,6.065,5.525,4.847,4.630,5.036,5.273,5.154,5.226,5.050,4.548,4.857,1.682,5.582,6.180,2.352,4.557,6.713,6.225,4.463,7.486,3.954 Use the CPD control chart to monitor the process variance (hint: you can use the recursive equations, see the slides and coding example). In the control chart, use n01=9,=0.005, and the control limit hn computed by the approximation formula based on Hawkins et al. 2003 as discussed in the slides