A PARETO CHART AT THE HARD ROCK HOTEL The Hard Rock Hotel in Bali has just collected the data from 75 complaint calls to the general managerduring the month of October. The manager wants to prepare an analysis of the complaints. The dataprovided are room service, 54; check-in delays, 12; hours the pool is open, 4; minibar prices, 3; andmiscellaneous, 2.

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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.