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The percent sign % (sometimes per cent sign in British English) is the symbol used to indicate a percentage, a number or ratio as a fraction of 100. Related signs include the permille (per thousand) sign ‰ and the permyriad (per ten thousand) sign ‱ (also known as a basis point), which indicate that a number is divided by one thousand or ten thousand, respectively.
Standardized mortality rate tells how many persons, per thousand of the population, will die in a given year and what the causes of death will be. Such statistics have many uses: [ citation needed ] Life insurance companies periodically update their premiums based on the mortality rate , adjusted for age.
The word promille is the cognate in Dutch, German, Finnish and Swedish, and is sometimes seen as a loanword in English with the same meaning as per mille. [7] [4] The symbol is included in the General Punctuation block of Unicode at U+2030 ‰ PER MILLE SIGN. [5] There is also an Arabic-Indic per mille sign at U+0609 ؉ ARABIC-INDIC PER MILLE SIGN.
In most forms of English, percent is usually written as two words (per cent), although percentage and percentile are written as one word. [9] In American English, percent is the most common variant [10] (but per mille is written as two words). In the early 20th century, there was a dotted abbreviation form "per cent.", as opposed to "per cent".
Incidence is usually more useful than prevalence in understanding the disease etiology: for example, if the incidence rate of a disease in a population increases, then there is a risk factor that promotes the incidence. For example, consider a disease that takes a long time to cure and was widespread in 2002 but dissipated in 2003.
In statistics, a k-th percentile, also known as percentile score or centile, is a score below which a given percentage k of scores in its frequency distribution falls ("exclusive" definition) or a score at or below which a given percentage falls ("inclusive" definition); i.e. a score in the k-th percentile would be above approximately k% of all scores in its set.
The death rate was 7.9 per 1,000. [8] The RNI was thus 0.91 percent. In 2012, the average global birth rate was 19.611 per 1,000 according to the World Bank [9] and 19.15 births per 1,000 total population according to the CIA, [10] compared to 20.09 per 1,000 total population in 2007. [11]
In statistics a population proportion, generally denoted by or the Greek letter, [1] is a parameter that describes a percentage value associated with a population.A census can be conducted to determine the actual value of a population parameter, but often a census is not practical due to its costs and time consumption.