Suppose we are looking at the salary of teachers. We let u be the mean salary of a teacher. We wish to test that the mean salary is above $35,000. That is, we test HO: µO= $35,000 0 H1: µ > $35,000 When we do the hypothesis test, we decide not to reject the null hypothesis. What type of error could we have made? O a. We've made a correct decision O b. Type II Error Ос. Туре I Error O d. We could make either a Type I error or a Type |l error О е. Туре III Error

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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.