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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: Aiming for a representative sample: Simulating random versus purposive strategies for hospital selection

Fig. 1

Illustration of sampling strategies. a Hospitals that are selected when using the non-probabilistic strategies of sampling the larges hospitals (LARG) and maximum variation (MAXVAR); b Possible selection of hospitals when the probabilistic RAND, REGVAR and 2REG strategies are conducted (since these strategies involve a random element, the figure shows only one of many possible samples)

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BMC Medical Research Methodology

ISSN: 1471-2288

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