Aqua Water Station claims that their drinking water has ph level that is close to pure water at 7. A health agency took 50 random samples from their water supply to test this claim. This resulted into a mean pH level of 6.6 with a standard deviation of 1.2. What type of test is appropriate for this situation? * O ztest O ttest O ftest O x-test

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.