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Meanings of stratify random in English

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Usage of stratify random in English
1
A stratified random sampling method was first used to identify suitable subjects.
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2
Design: Epidemiological survey in a proportionally stratified random sample of nursing homes.
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3
Methods: Participants were selected by age- stratified random sampling from electoral lists.
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4
Study design: Diagnostic test study with stratified random sampling of hospitalizations for chart review.
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5
Sample: Hospitals were selected using a stratified random sampling method.
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6
The interviewees were selected using a stratified random cluster sampling.
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7
The NIS is a 20% stratified random sample representative of all United States hospitals.
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8
Multistage stratified random sampling, with probability proportional to size was used to select a representative sample.
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9
A population of 25,228 children was selected using stratified random sampling method.
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10
Using stratified random sampling, we enrolled women age 15+.
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11
The Nationwide Inpatient Sample represents a 20% stratified random sample representative of all United States hospitals.
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12
Methods: A structured, open-ended questionnaire was mailed to a regionally stratified random sample of 90 diabetes nurse educators.
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13
A stratified random sample (n = 285) with differing probabilities was selected for a second-stage interview.
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14
From the approximately 10,000 participants, stratified random samples were selected for detailed clinical evaluation.
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15
One feature is that clinical evaluation for Alzheimer's disease is confined to a stratified random sample of all participants.
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16
A survey assessing barriers and other factors was distributed to a stratified random sampling of older women with CAD.
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