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Related Concept Videos

Sample Size Calculation01:19

Sample Size Calculation

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Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
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Data Validation01:03

Data Validation

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Data validation is an essential part of a comprehensive assessment. Validation is confirming or verifying and opening the door to gathering more assessment data as it clarifies vague or unclear data. The process of checking and verifying the collected information is called data validation. The primary purpose of data validation is to ensure data is as free from error, bias, and misinterpretation as possible.
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Formulating and Validating Nursing Diagnosis II01:25

Formulating and Validating Nursing Diagnosis II

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Nursing diagnoses represent a problem validated by major defining characteristics. There are four categories of nursing diagnoses: problem-focused, risk, health promotion or wellness, and syndrome. The anatomy of a nursing diagnosis includes three components: problem statement or diagnostic label, defining characteristics, and related factors.
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Nursing Interventions II: Selecting and Classifying the Nursing Interventions01:29

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Creating and executing a nursing diagnosis helps nurses plan care and guide patient, family, and community interventions. They are developed based on a patient's physical evaluation and support measuring the outcomes. It is not recommended to select random interventions throughout the planning process. Instead, consider the following six essential factors when choosing interventions:
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Formulating and Validating Nursing Diagnosis I01:26

Formulating and Validating Nursing Diagnosis I

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A nursing diagnosis is written when the nurse recognizes a cluster of essential patient data indicating health problems treated with independent nursing interventions. The standardized terminologies of a nursing diagnosis help nurses identify and treat patients' problems. Every electronic health record that uses nursing diagnosis must employ standard diagnostic terminology. Developing an efficient, individualized care plan begins with accurate nursing diagnoses.
There are thirteen domains...
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Sample Proportion and Population Proportion01:20

Sample Proportion and Population Proportion

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Collecting samples or responses from an entire population takes significant time and effort, so a researcher collects responses from only a sample of that population. Suppose a study needs to collect information about a specific mobile application. After sample collection, the researcher analyzes the data and discovers that most individuals in the sample use that specific mobile application. The sample proportion measures the number of individuals in a sample who either use or don't use the...
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Related Experiment Video

Updated: Jul 21, 2025

Breakfast Habits among Schoolchildren in the City of Uruguaiana, Brazil
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Establishing appropriate sample size for developing and validating a questionnaire in nursing research.

Joko Gunawan1,2, Colleen Marzilli3, Yupin Aungsuroch1

  • 1Faculty of Nursing, Chulalongkorn University, Bangkok, Thailand.

Belitung Nursing Journal
|July 27, 2023
PubMed
Summary

Using a sample size of thirty is common but inadequate for questionnaire development and validation. This editorial guides researchers on appropriate sample size selection to avoid manuscript rejections and ensure robust nursing research.

Area of Science:

  • Nursing Research
  • Psychometrics
  • Health Sciences

Background:

  • The sample size of thirty is frequently cited as adequate for questionnaire validation in nursing research.
Keywords:
instrument developmentnursing researchquestionnairesample sizevalidation

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  • This conventional sample size is often insufficient for robust questionnaire development and validation.
  • Manuscript rejections are common due to inappropriate sample size selection.