Question 10 The complex number B is given by B (1- t) + (2t)i, where t is real. II tan) (i) Show that IB = 1 + t2 and arg(B) 0 where t = t (ii) Write down the modulus and argument of one square root of B, and hence if z2 = B, write z in the form a + ib where a and b are real. (iii) Hence find the two square roots of -8+ 6i

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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.