A food inspector in the Techiman Municipal examining 12 jars of a certain brand of shea butter, obtained the following jars of a certain brand of shea butter obtained the following percentage of impurities. 2.3, 1.9, 2.1, 2.8, 2.3, 3.6, 1.4, 1.8, 2.1, 3.2, 2.0 and 1.9 The inspector knows from experience that the average maximum impurities is 2.8 percent. Assuming that the sample comes Irom a normal population, llon 6. Test at 2% significance level whether the inspectors claim is a. accurate b. Construct a 98% confidence interval for the true average impurities

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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.