与"stratified random sampling"相近的词条

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• stratified inhomogeneity
• stratified pavement epithelium
• stratified phloem
• stratified random
• stratified random sample
• stratified random sampling
• stratified randomized design
• stratified sample
• stratified sampling
• stratified sampling method
• stratified secondary wall
• stratified sedimentation
• stratified spuamous epithelium
• stratified squamous epithelia
• stratified squamous epithelium
• stratified thrombus

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