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Вы можете ознакомиться и скачать презентацию на тему Sampling in quantitative research. Доклад-сообщение содержит 14 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

Слайды и текст этой презентации

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Question Tell whether the following statement is true or false: The aggregate of cases in which a researcher is interested is called a sample.

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Answer False The aggregate of cases in which a researcher is interested is called a population. A sample is selection of a portion of the population to represent the entire population.

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Basic Sampling Concepts in Quantitative Studies Population: the aggregate of cases in which a researcher is interested Sampling: selection of a portion of the population (a sample) to represent the entire population Element: basic population unit about which information is collected

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Eligibility Criteria Establish population characteristics Determine participation in study Maximize construct validity Inclusion Exclusion

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Question Tell whether the following statement is true or false: Researchers usually sample from the target population.

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Answer False Researchers usually sample from the accessible population but should identify the target population to which they want to generalize their results.

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Basic Sampling Concepts in Quantitative Studies Representative sample A sample whose key characteristics closely approximate those of the population Sampling bias The systematic over- or underrepresentation of segments of the population on key variables

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Question Tell whether the following statement is true or false: Probability sampling involves random selection of elements.

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Answer True Probability sampling involves random selection of elements.

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Basic Sampling Concepts in Quantitative Studies (cont.) Probability sampling Involves random selection of elements Nonprobability sampling Does not involve selection of elements at random