d) Compute the 95% confidence interval for “pcol”.   e.)  Do the results from your confidence interval (3d) and hypothesis test (3c) agree? Why or why not?  f) Interpret the constant (mathematically and statistically).

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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.