Question: Consider the data presented in Table for the tracking arm example. Suppose that an R chart is constructed based on sample numbers 1 to 15 only.
a. What is the estimate of obtained from these 15 observations only?
b. What are the values of the UCL and LCL for an R chart based on these observations only?
![988_12-1.png](https://secure.tutorsglobe.com/CMSImages/988_12-1.png)