Back Assignment 4.xisx EMNT509 QUALITY CONTROL - ASSIGNMENT No.: 4 Problems 7-49, 7-50 and 7-51 Submition Deadline : 3 April 2022; 23:59 (GMT+3) 7-49 An investment bank is interested in monitoring the weekly amount (in millions of Table 7-31 - Weekly Investment dollars) invested in volatile stocks so as to maintain a stable rate of return on a selected in Volatile Stocks fund. Table 7-31 shows 25 consecutive weeks of the amount invested ($M) in the fund. Construct appropriate control charts and comment on the stability of invest- Week Investment ($M) ment. Revise the chart, if necessary, assuming special causes for out-of-control 16,2 points. What is your estimate of the standard deviation of the weekly amount invested? 2 10.8 3 18.9 7-50 Refer to Exercise 7-49 and the revised process. Is this process capable of meeting a 4 14,4 goal value of $1.5M for the standard deviation of the weekly amount invested? 5 Construct an appropriate chart and discuss. 15,7 6 25,3 7-51 Refer to Exercise 7-49. Construct an exponentially weighted moving-average chart using a weighting constant of 0.2 for the weekly amount invested. Comment on the 7 20,4 process. If it is desired to have a goal value of $1.5M for the standard deviation, using 8 22,6 the constructed chart, comment on the ability of the process to achieve this goal. 9 17,8 10 12.9 11 28.5 12 23,3 13 20,2 14 19,3 15 14,8 16 18,7 17 10.4 18 21,7 19 16,3 20 14,2 21 21,5 22 18,6 23 20.9 24 2,4 25 21,8