Designated as single, twin, triplet, quadruplet. The total of all individuals in a given area. An infant between 28 days and one year of age. Birth at less than 37 completed weeks of gestation. A portion of a population in relation to another portion of the population or to the population as a whole.
Proportions are a special type of ratio in which the denominator always includes the numerator.
The distance between the smallest and largest numbers in a set of numbers. The frequency of a demographic event in a specified period of time divided by the population at risk of the event. The relation of one population subgroup to another subgroup, or to the whole population. The denominator of a ratio may or may not include the numerator. If the denominator includes the numerator, it is a special type of ratio known as a proportion.