Unsafe Unrelated Conditions to Conditions Day Swing Night 10% 35% Shift 8% 20% 5% 22%
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.
A certain factory operates three different shifts. Over the
last year, 200 accidents have occurred at the factory.
Some of these can be attributed at least in part to unsafe
working conditions, whereas the others are unrelated to
working conditions. The accompanying table gives the
percentage of accidents falling in each type of accident–
shift category.
Suppose one of the 200 accident reports is randomly
selected from a file of reports, and the shift and type of
accident are determined.
a. What are the simple
b. What is the probability that the selected accident was
attributed to unsafe conditions?
c. What is the probability that the selected accident did
not occur on the day shift?
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