Definition of homogeneous written for english language learners from the merriamwebster learners dictionary with audio pronunciations, usage examples, and countnoncount noun labels. Homogeneous definition, composed of parts or elements that are all of the same kind. In descriptive studies, it is customary to define a study population and then make. To determine if a given population is homogeneous or not, construct the histogram of a random sample from the entire population. Consider the population of oneml units we have taken as an example. Homogeneous mixture is the same in the top as it is in the bottom. A population is a collection of organisms, usually of the same species, that occupy a prescribed region and function together as an ecological entity. You also often need to solve one before you can solve the other. From cambridge english corpus in their experiments, the top and bottom layers are homogeneous fluids with different densities, with an interfacial layer of approximately uniform stratification between them. Samples and populations case studies sex and older women 5 21 the big picture many of the statistical methods we will encounter this semester are based on the premise that the data we have at hand the sample is representative of some larger group the population. Many examples of active swarms are biological in nature e. Homogenous sampling involves selecting similar cases to further investigate a particular phenomenon or subgroup of interest.
An industrial society features a single homogeneous culture common to the entire population. Homogeneous sampling is used when the goal of the research is to understand and describe a particular group in depth. Erwin schrodinger first published 1944 what is life. Heterogenous means unalike or distinct from one another. The logic of homogenous sampling is in contrast to the logic of maximum variation sampling. If you are describing a society that is made up of very similar people, would you describe this society as homogenous or homogeneous. Rwjf qualitative research guidelines project homogeneous. Assessing the homogeneity of the population would involve looking to see whether the responses of certain identifiable subpopulations differ from those of others. For example a data set made up of 20yearold college students enrolled in physics 101 is a homogeneous sample what is homogeneous sampling. Oecd glossary of statistical terms homogeneity definition. This term is used in statistics in its ordinary sense, but most frequently occurs in connection with samples from different populations which may or may not be identical. Every descriptive measure value shown there is a parameter, as it is computed from information obtained from the entire population. While most populations consist of a single species, the definition of a population is intended to be sufficiently broad to include.
In the broad context of human populations one of the central objects of geneenvironment interaction gei research and of this article a homogeneous population is one that is believed to have, or that can be made to have, a uniform character, where all the constituents are of the same or similar nature, and are therefore recombinable. Pdf epidemiology, mortality rate and survival in a. A homogeneous community is a group of people who are all of the same culture, race, or ethnicity living within a community or area. Cluster sampling is generally used when the researcher cannot get a complete list of the units of a population they wish to study but can get a complete list of groups or clusters of the population. Homogeneous definition of homogeneous by merriamwebster. Water is an example of a homogenous mixture because even though it is made of two. The similar word homogenous originally created for the science of genetics and used with the meaning of, relating to, or derived from another individual of the same species can also be a synonym of homogeneous. Homogeneous is used to describe a group or thing which has members or parts that are all. The definition of homogeneous is all the same, or of a similar structure or quality. A realdata example is given to illustrate the methods. Stratified type of sampling divide the universe into several sub group of population that are individually more homogeneous than the total population the sub populations differences are called strata and. Population resistance is distributed over a multitude of values.
For example, in previous simulation studies overall, atlas, and gibson, 1995. Fundamentals of homogeneous nucleation when the concentration of a solute in a solvent exceeds its equilibrium solubility or temperature decreases below the phase transformation point, a new phase appears. Pdf homogeneous and heterogeneous populations of active rods. Ecology, freely translated from the greek expression, means the study of the household of nature. Pdf dualrecord system drs equivalently two sample capturerecapture. Homogeneous, which derives from the greek roots homos, meaning same, and genos, meaning kind, has been used in english since the mid1600s. Homogeneous population a homogeneous population is a statistical population which has a unique mode. A homogenous mixture is one that is uniform throughout or a population that shares many of the same genealogy. Defining homogeneous and nonhomogeneous differential. More products are becoming homogeneous commodities for which uniformity of size, quality and taste is absolutely essential. Shocks in homogeneous and heterogeneous populations mpidr.
Homogeneous definition in the cambridge english dictionary. The sample used in the study was relatively small compared to previous studies and was made up of relatively homogeneous individuals making it difficult to generalize the results to the wider population. Chocolate dough is homogeneous italian salad dressing is heterogeneous. Homogeneity and heterogeneity as situational properties. They will help you out tremendously in the sciences. A manual for selecting sampling techniques in research 4 preface the manual for sampling techniques used in social sciences is an effort to describe various types of sampling methodologies that are used in researches of social sciences in an easy.
Usually this division of population is similar to what the standard of division has been used yet. A heterogeneous population is one containing subpopulations of different types. Heterogeneous population an overview sciencedirect topics. In general, homogeneity in statistics means similarity. Homogeneous definition for englishlanguage learners. Despite their spelling similarities, these words are not synonyms. Values from different units are assumed to be independent although this is relaxed in the last section of the chapter. Homogeneous definition and meaning collins english. Population heterogeneity and causal inference semantic scholar.
Rna function is homogeneous if it is homogeneous of. Homogeneous populationeco6416 homogeneous population a. Education world takes a look at recent information from researchers and from teachers on the issue. This similarity is not the same for all situations. It means that the system is absolutely reliable in the absence of. Qualities and characterization of various types of populations within a social or geographic group, with emphasis on demography, health status, and socioeconomic factors. In order to identify a nonhomogeneous differential equation, you first need to know what a homogeneous differential equation looks like. This chapter describes the simplest possible model for a finite population. The sample size in each stratum varies according to the relative importance of the stratum in the population. Homogenous populations are alike and heterogeneous populations are unalike. A material or image that is homogeneous is uniform in composition or character i.
Thus, a homogenous population has little variation. Use the significance table below to help decide whether the minimum temperature data at sherbrooke is homogeneous. Blank boxes are not included in the calculations but zeros are. A homogeneous population is one where all individuals can be regarded as the same type. Homogeneous definition of homogeneous by the free dictionary. Homogeneous definition is of the same or a similar kind or nature. One is an outdated term from biology, while the other is an adjective that refers. Homogeneous dictionary definition homogeneous defined. This is a javascript that computes and graph histogram of a given set of data as a tool in checking the unimodality of the population. For the malthusian version of the model, given by eq. In a recent evaluation of village level revitalization in aceh, posttsunami, leadership was identified as a. For example, a population of humans that has inhabited an island for. If we can get a short list which contains all solutions, we can then test out each one and throw out the invalid ones. Homogeneous functions ucsbs department of economics.
Pdf on the estimation of homogeneous population size from a. A manual for selecting sampling techniques in research. What are homogeneous and heterogeneous populations. Samples and populations samples and populations 7 21 samples and populations cont. The times literary supplement 2011 firms in a perfectly competitive industry. It is appropriate when there is no auxiliary information that can distinguish between different population units. A data set is homogeneous if it is made up of things i. Epidemiology, mortality rate and survival in a homogeneous population of hypopituitary patients.
Homogeneity can be tested by noting how many runs were present in the sample compared to how many total elements were in the sample. If the populations are identical they are said to be homogeneous, and by extension, the sample data are also said to be homogeneous. If you learn them you will be able to identify and define word combinations you have never seen before. Enter your 15to80 sample data, and then click the calculate button. If the difference between the two different types is large enough, you may get a. Let us consider the case homogeneous nucleation of a solid phase from a supersaturated solution as an example.
Numbers due to large genetically homogeneous population sizes are different from those due to colonial expansion and assimilation. The process of selecting a small homogeneous group of subjects or units for examination and analysis. For instance population spread over a country is clustered up into cities, population spread over a city is clustered up into towns etc. Homogeneity and heterogeneity are concepts often used in the sciences and statistics relating to the uniformity in a substance or organism. But there are really small chinese and japanese community in north korea. The homogeneous population model assumes equal expected value and variance for the variable of interest for all population units. Here, i wish to borrow neymans definition of populations duncan. A population is all the individuals or units of interest. Homogeneous differential equations involve only derivatives of y and terms involving y, and theyre set to 0, as in this equation.
Based on lectures delivered under the auspices of the dublin institute for advanced studies at trinity college, dublin, in february 1943. Because the country is ranked as the most corrupt and worst country to live in and it is also a cl. You could refer to a specific trait, such as hair color or you could refer to genetic diversity. To the memory of my parents preface a scientist is supposed to have a complete and.