You are a quality control manager and would like to determine if the process is in control or not. Suppose that the average weight of units is 10 and process standard deviation of the weights of units (standard deviation of original units) is 1.0. You use the significance level 0.26% (corresponding to z=3,-3). How many observations exceed the upper control - lower control range? Unit1 Unit2 Unit3 Unit4 Sample Mean Sample 1 8 8 10 10 9 Sample 2 12 9 9 10 10 Sample 3 10 12 11 11 11 Sample 4 7 9 7 9 8 Sample 5 11 14 11 12 12 This is a continuation from the previous question. You are a quality control manager. Your boss asks you to make the manufacturing system more efficient by reducing the frequency to stop&check the manufacturing process (even if it may raise the chance of shipping defective items.) What should you do with the upper control limit (UCL) and the lower control limit (LCL)? Choose the best answer. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a You may want to decrease the level of UCL and increase the level of LCL b You may want to increase the level of UCL and decrease the level of LCL You may want to increase the levels of both UCL and LCL d You may want to decrease the levels of both UCL and LCL e You may want to keep the levels of UCL and LCL the same as before