In analyzing hits by bombs in a past war, a city was subdivided into 639 regions, each with an area of 0.5-mi². A total of 555 bombs hit the combined area of 639 regions. (a) Find the mean number of hits per region: mean = (b) If a region is randomly selected, find the probability that it was hit exactly twice. (Report answer accurate to 4 decimal places.) (c) Based on the probability found above, how many of the 639 regions are expected to be hit exactly twice?
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.
In analyzing hits by bombs in a past war, a city was subdivided into 639 regions, each with an area of 0.5-mi². A total of 555 bombs hit the combined area of 639 regions.
(a) Find the mean number of hits per region:
mean =
(b) If a region is randomly selected, find the
(Report answer accurate to 4 decimal places.)
(c) Based on the probability found above, how many of the 639 regions are expected to be hit exactly twice?
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