randomization
Noun: 1. The process or act of making something random; a deliberately haphazard arrangement of observations or treatments to simulate chance. This is a controlled procedure, often used in scientific experiments and statistical sampling, to eliminate bias by ensuring each item or subject has an equal probability of being selected or assigned to a particular group.
In scientific research:
- The randomization of participants into control and treatment groups is a cornerstone of a valid clinical trial.
- Proper randomization helps ensure that the results of the study are not due to pre-existing differences between groups.
In statistics and sampling:
- The survey used randomization to select phone numbers, giving every household an equal chance of being contacted.
- Without adequate randomization, the sample may not be representative of the larger population.
"Block randomization": A technique used to ensure that equal numbers of participants are assigned to each group within smaller blocks or batches.
- The researchers used block randomization to maintain balance between groups as subjects were enrolled over time.
"Stratified randomization": A method where participants are first divided into subgroups (strata) based on specific characteristics (e.g., age, disease severity), and then randomization is performed within each stratum.
- Stratified randomization was employed to guarantee that both treatment groups had similar proportions of patients with severe symptoms.
- Randomize (verb): To make random; to arrange or select in a random way.
- You must randomize the order of the test questions.
- Random (adjective): Made, done, or chosen without method or conscious decision.
- A random sample was taken from the list.
- Randomly (adverb): In a random manner.
- Participants were randomly assigned to one of three conditions.
- Random allocation: The assignment of items or subjects by chance.
- Random assignment: Specifically used in experimental design for distributing participants to groups.
- Random selection: The process of choosing a sample where each member of a population has an equal chance of being included.
- "Principle of randomization": A fundamental rule in experimental design stating that treatments should be allocated to experimental units at random.
- Adhering to the principle of randomization minimizes selection bias.
- "Randomization test" (or permutation test): A type of statistical significance test where the distribution of the test statistic is obtained by calculating all possible values under rearrangements of the labels on the observed data points.
- When assumptions for a t-test are violated, a randomization test can be a useful non-parametric alternative.
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a deliberately haphazard arrangement of observations so as to simulate chance
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