A manager informs 2 employees, Annie and Caroline, that their performance will be rated according to categories with the percentage weightings shown in the Table below. The one who obtains the largest weighted mean score will be awarded a salary rise. Category Weighting Initiative 30% Creativity 50% Ability to meet deadlines 20% Annie and Caroline are given score out of 10 in each category, and their scores are shown below Category Annie’s scores Caroline’s scores Initiative 3.5 6.0 Creativity 8.0 6.5 Ability to meet deadlines 5.5 8.0 2.2.1 Calculate the unweight mean score for each employee, state who get salary rise sing this method. (4) 2.2.2 Calculate the weighted mean score for each employee, and state who get salary rise using this method

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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.