A total of 300 observations of Bob Ramos, an assembly-line worker, were made over a 40-hour workweek. The sample also showed that Bob was busy working (assembling the parts) during 250 observations.a) Find the percentage of time Bob was working.b) If you want a confidence level of 95%, and if {3% is an acceptableerror, what size should the sample be?c) Was the sample size adequate?

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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.