21. A new medicine is designed to reduce blood pressure, and is being tested in two doses (100 mg and 50 mg). A placebo group is also formed to compare against the two experimental groups. The reduction in blood pressure among patients in each group is as follows: 100 mg 15 11 -2 23 11 21 17 18 -5 50 mg -4 9. 7 -11 13 -5 24 31 20 -4 Placebo 3 9. -2 17 27 -8 14 3 -2 Can we say that there is a significant result in these findings? (a = .10) 21

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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.