A manufacturer of automobile transmissions uses two different processes. Management ordered a study of the production costs to see if there is a difference between the two processes. A summary of the findings is shown next.   Process 1 Process 2 Total Process totals ($100s) 137 108 245 Sample size 10 10 20 Sum of squares 1893 1188 3081   a) What is the critical value of F at the 5% level of signi

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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.