The following probability distributions of job satisfaction scores for a sample of information systems (IS) senior executives and middle managers range from a low of 1 (very dissatisfied) to a high of 5 (very satisfied). Job Satisfaction Score Probability IS Senior Executives IS Middle Managers 1 0.05 0.04 2 0.09 0.10 3 0.04 0.12 4 0.44 0.46 5 0.38 0.28 (a) What is the expected value of the job satisfaction score for senior executives?   (b) What is the expected value of the job satisfaction score for middle managers?   (c) Compute the variance of job satisfaction scores for executives and middle managers. executivesmiddle managers

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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.