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Within each stratum, several randomization strategies can be applied, which involves [[Simple random sample|simple randomization]], [[Blocking (statistics)#Blocking used for nuisance factors that can be controlled|blocked randomization]], and [[Minimisation (clinical trials)|minimization]].

Within each stratum, several randomization strategies can be applied, which involves [[Simple random sample|simple randomization]], [[Blocking (statistics)#Blocking used for nuisance factors that can be controlled|blocked randomization]], and [[Minimisation (clinical trials)|minimization]].

在每一层中，可以应用几种随机试验策略，包括<font color="#ff8000"> '''简单随机试验 Simple randomization''' </font>、<font color="#ff8000"> '''分块随机试验你Blocked randomization''' </font>和<font color="#ff8000"> '''最小化试验 Minimization''' </font>。

在每一层中，可以应用几种随机试验策略，包括<font color="#ff8000"> '''简单随机试验 Simple randomization''' </font>、<font color="#ff8000"> '''分块随机试验 Blocked randomization''' </font>和<font color="#ff8000"> '''最小化试验 Minimization''' </font>。

=== Simple randomization within strata ===

=== Simple randomization within strata ===

Simple randomization is considered as the easiest method for allocating subjects in each stratum. Subjects are assigned to each group purely randomly for every assignment. Even though it is easy to conduct, simple randomization is commonly applied in strata that contain more than 100 samples since a small sampling size would make assignment unequal.<ref name=":0" />

Simple randomization is considered as the easiest method for allocating subjects in each stratum. Subjects are assigned to each group purely randomly for every assignment. Even though it is easy to conduct, simple randomization is commonly applied in strata that contain more than 100 samples since a small sampling size would make assignment unequal.<ref name=":0" />