A process sampled 20 times with a sample of size 8 resulted in  = 26.5 and R = 1.8.  Compute the upper and lower control limits for the  x chart for this process. (Round your answers to two decimal places.) UCL= LCL= Compute the upper and lower control limits for the R chart for this process. (Round your answers to two decimal places.) UCL= LCL=

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.