People on a street were asked, what pet(s) do they have at home. Some own a cat, some own a dog, some own a bird, some own several of those pets and some do not have pets. After responses were processed, following can be mentioned: – 150 had cats (no info if they have other animal also) – 130 – dogs (no info if they have other animal also) – 50 – bird (no info if they have other animal also) – 60 cat and dog (no info if they have other animal also) 5 – 20 - cat and bird (no info if they have other animal also) – 30 – dog and bird (no info if they have other animal also) – 70 do not have animals – 10 have cat and dog and bird. a) Draw a Venn Diagram to illustrate different sets of people possessing different pets. b) How many people were questioned?
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.
People on a street were asked, what pet(s) do they have at home. Some own a
cat, some own a dog, some own a bird, some own several of those pets and some
do not have pets. After responses were processed, following can be mentioned:
– 150 had cats (no info if they have other animal also)
– 130 – dogs (no info if they have other animal also)
– 50 – bird (no info if they have other animal also)
– 60 cat and dog (no info if they have other animal also)
5
– 20 - cat and bird (no info if they have other animal also)
– 30 – dog and bird (no info if they have other animal also)
– 70 do not have animals
– 10 have cat and dog and bird.
a)
Draw a Venn Diagram to illustrate different sets of people possessing
different pets.
b)
How many people were questioned?
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