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The sample size should give accuracy required for the purpose of particular study. The sample size should be sufficiently large to provide statistical stability or reliability. It should be large enough to represent the universe properly. (3) Proportional: A sample should be proportional. In brief sample should be selected carefully as improper sampling is a source of error in the survey. It will be truly representative only when it represents all types of units or groups in the total population in fair proportions. There are different methods for selecting a sample. (2) Accurate representative of the universe: A sample should be an accurate representative of the universe from which it is taken. It is means and should be oriented to the research objectives and fitted to the survey conditions. (1) Goal-oriented: A sample design should be goal oriented. of what is appropriate content for this section and meet with your MSPE advisor to craft your points. see noteworthy characteristics handout for examples. The bullet points are written in the third person by the student and may be edited by Student Affairs. In fact, by the time the data from the population has been collected and analyzed, a couple of years would have passed, making the analysis worthless since a new population would have emerged. NOTEWORTHY CHARACTERISTICS total number of students in a city can be taken as a population, and the total number of dogs in a city is also a population size. The total number of people in any given country can also be a population size. For example, as of 2017, the population of the world was 7.5 billion of which 49.6% were female and 50.4% were male. In basic terms, a population is the total number of individuals, animals, items, observation, data, etc.

A sample should represent the whole population and not reflect bias toward a specific attribute. Samples are used in statistical testing when population sizes are too large for the test to include all possible members or observations. It is a subset containing the characteristics of a larger population. A sample is a smaller, manageable version of a larger group.