Which four variables govern changes in population size?
a. births, age structure, immigration, and emigration
b. births, deaths, immigration, and emigration
c. births, health, immigration, and emigration
d. age structure, deaths, immigration, and emigration
e. births, deaths, immigration, and age structure
Which four variables govern changes in population size?
a. births, age structure, immigration, and emigration
b. births, deaths, immigration, and emigration
c. births, health, immigration, and emigration
d. age structure, deaths, immigration, and emigration
e. births, deaths, immigration, and age structure
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Related questions
The following table is a summary of a random sample from all individuals who were first
elected to the U.S. House of Representatives in the Years 1910-1960.
Age at First Election (in years) Number of Congressmen
| Age at First Election (in years) | Number of Congressmen |
| 25 up to but not including 35 | 5 |
| 35 up to but not including 45 | 40 |
| 45 up to but not including 55 | 35 |
| 55 up to but not including 75 | 20 |
(a) What is the data collecting method?
(b) What is the population from which the sample was selected?
(c) What is the variable of interest?
(d) What is the type of this variable?
(e) What is the sample size?
(f) What is the percentage of congressmen who were younger than 45 years when they were first elected?
(g) What is the percentage of congressmen who are 35 years or older when they were first elected?
