3 The heights in metres (x) and weights in kilograms (y) of ten male gorillas are shown in the table. 1.9 1.83 1.81 1.79 1.74 1.91 1.93 1.86 1.81 1.95 y 275 267 260 257 258 272 273 268 261 273 a Calculate the value of r. Comment on the correlation. b Write down the equation of the least squares regression line for this data. CFind the mean height for this group of male gorillas. d Find the mean weight for this group of male gorillas. e Plot the data points on a scatter diagram together with the regression line of y on x, clearly marking and labelling the mean point.

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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.