عبدالله القرني Abdullah Algarni
عبدالله القرني Abdullah Algarni

@abaidalgarni

11 تغريدة 16 قراءة Jul 29, 2022
ياليل بو لمبة، عندي بحث وودي أعرف حجم العينة المطلوبة؟
بسيط إن شاء الله، تعال هلم وركز في العشر الصور التالية من كتاب
Biostatistics for Dummies
#Abo7aneen
🤔Ur research question: Is there significant difference btw mean BP readings following anti-HTN Rx compared to placebo?
🤔Is there significant difference btw mean BP readings among ≥3 groups (e.g., CCB, ACEI, and placebo)?
🤔Is there significant improvement in BP reading before and after Tx?
🤔Is there a significant difference btw two groups mortality rate (CCB vs ACEI to prevent CV mortality)?🤔
🤔Is there a significant correlation btw body wt and BP?
🤔Are pts using CCB for Tx of HTN developed CHF earlier than ACEIs🤔?
🤔I want to scale up power from 80% to say 90%, what can I do?🤔
🤔I want to scale up the significance level (Alpha level, P value) from 0.05 to say 0.001, what should I do?
🤔I have an unequal two groups, how can I consider this issue in my statistical analysis?
🤔We expecting some dropout/attrition from our study, how can we adjust for that upon calculation of sample size?

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