Considering variable control charts: i. It is more important to choose large samples than to sample frequently, since large samples provide more precise information about the process. ii. Variability due to common causes does not increase or decrease much over short periods of time. iii. If a process is in a state of statistical control, there will be almost no variation in the output. a Only statement iii is true O b. Only statement ii is true OC. Only statement ii and iii is true O d. All statements i-ili are false. QUESTION 27 Samples of eight bolt are taken periodically, and their diameters (in mm) are measured. The following means were taken from 25 consecutive samples: x =9.9892, R =0.2628, and s =0.088. Calculate the LCL for the R chart. a. 9.8912 b. 0. 1206 C. 0.0163 d. 0.0357