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Another method of grouping the data is to use some qualitative characteristics instead of numerical intervals. For example, suppose in the above example, there are three types of students: 1) Below normal, if the response time is 5 to 14 seconds, 2) normal if it is between 15 and 24 seconds, and 3) above normal if it is 25 seconds or more, then the grouped data looks like:
Aggregate data is high-level data which is acquired by combining individual-level data. For instance, the output of an industry is an aggregate of the firms’ individual outputs within that industry. [1] Aggregate data are applied in statistics, data warehouses, and in economics. There is a distinction between aggregate data and individual data.
The Census of Sri Lanka is a census held by the Department of Census and Statistics of the Government of Sri Lanka, traditionally taking place every 10 years.The first census of Sri Lanka was taken in 1871, making it the first country in South Asia to conduct a census.
In descriptive statistics, summary statistics are used to summarize a set of observations, in order to communicate the largest amount of information as simply as possible. Statisticians commonly try to describe the observations in a measure of location, or central tendency, such as the arithmetic mean
The apex body in Sri Lanka for government research funding is the National Science Foundation of Sri Lanka. [2] The Accelerating Higher Education Expansion and Development (AHEAD), a joint program between the Sri Lankan government and the World Bank, provides research grants to Sri Lanka's higher education institutes.
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Case–control study versus cohort on a timeline. "OR" stands for "odds ratio" and "RR" stands for "relative risk".In statistics, epidemiology, marketing and demography, a cohort is a group of subjects who share a defining characteristic (typically subjects who experienced a common event in a selected time period, such as birth or graduation).
Sri Lanka, [b] historically known as Ceylon, [c] and officially the Democratic Socialist Republic of Sri Lanka, is an island country in South Asia. It lies in the Indian Ocean , southwest of the Bay of Bengal , separated from the Indian peninsula by the Gulf of Mannar and the Palk Strait .