The porosity of Wara formation is normally distributed with a mean of 18% and a standard deviation of 4%. a) What is the probability that a core sample will have a porosity between 26 and 28 %? b) What is the probability that a core sample has a porosity of at least 20%? c) If five core samples selected at random, find the probability that all these cores will have porosity more than 47.6%? comment on your answer.

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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.