The average weekly earnings of the plumbers in a city is $932 with a population standard deviation of $24. Assume that we select a random sample of 63 plumbers. a) What is the sampling distribution of the mean weekly earnings of plumbers? (i.e. What is the sampling distribution of x̅?) b) Find the probability that the sample mean weekly earnings will be between $925 and $928

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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.