A supplier tells a large hospital stockroom that the facility should buy 30% small, 45% medium and 25% large surgi-cal gloves. When the stockroom manager randomly surveys 100 workers about their size preferences, 23 request small,57 medium, and 30 large gloves. The manager wonders thisconstitutes evidence that the supplier’s recommendationwon’t meet the hospital’s needs? What test should she run?A) chi-square goodness of fit testB) chi-square test of homogeneityC) 1-sample t-testD) 1-proportion z-testE) 2-proportion z-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.