Family Size. A family is dened to be a group of two or more persons related by birth, marriage, or adoption and residing together in a household. According to Current Population Survey, published by the U.S. Census Bureau, the size distribution of U.S. families is as follows. Frequencies are in thousands. Size Frequency 2 37,148 3 17,810 4 15,054 5 6,660 6 2,438 7+ 1,395 A U.S. family is selected at random. Find the probability that the family obtained has a. two persons.b. more than three persons.c. between one and three persons, inclusive.d. one person.e. one or more persons.
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.
Family Size. A family is dened to be a group of two or more persons related by birth, marriage, or adoption and residing together in a household. According to Current Population Survey, published by the U.S. Census Bureau, the size distribution of U.S. families is as follows. Frequencies are in thousands.
|
Size |
Frequency |
|
2 |
37,148 |
|
3 |
17,810 |
|
4 |
15,054 |
|
5 |
6,660 |
|
6 |
2,438 |
|
7+
|
1,395
|
A U.S. family is selected at random. Find the
a. two persons.
b. more than three persons.
c. between one and three persons, inclusive.
d. one person.
e. one or more persons.
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