作者aifor3 (ai)
看板Statistics
標題[問題] 統計描述看不懂 500p徵好心人
時間Wed Dec 9 13:36:00 2015
Power analysis determined that a sample size of at least 20 subjects
per group would achieve 80% power to detect a 2-point change in NRS
scores between treatment groups, with estimated group SDs of 2 for a
2-sided test with a significance level α of .05 (PASS-NCCS, 2011,
Kaysville, UT
這段是說有檢定力的分析需要每個group需要20個受試者嗎
NRS SCORE是臨床評斷疼痛的指標
但剩下看不太懂
achieve 80% power to detect a 2-point change
with estimated group SDs of 2 for a
2-sided test with a significance level α of .05
謝謝版上的大家了= =
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1F：→ allen1985: 你知道power的定義嗎 12/09 14:21
2F：推 sean50301: P(reject Ho | Ha is true) 12/09 14:48
3F：推 imaltar: 在power為0.8,alpha為0.05,2 side,假設標準差為2,NRS di 12/09 16:22
4F：→ imaltar: fference假設為2的情況下,估得每個group約需20人,sas 中 12/09 16:22
5F：→ imaltar: proc power可執行次過程 12/09 16:22
6F：推 imaltar: 這個樣本估計有考慮到drop out rate嗎？ 12/09 17:03