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* Sample question :).
 #855078  
  aricept123 - 10/19/18 12:51
 
  A randomized controlled trial is conducted to assess the effectiveness of a new combination-drug antihypertensive single-drug therapy. Study participants include 140 women( 70%) and 60 men ( 30%) ages 30 to 60 years, with baseline blood pressure measurements of 150/95 mmHg or higher. The investigators defined antihypertensive therapy as effective if the treatment resulted in a blood pressure measurement below 140/90 mmHg. When designing the study, the investigators set the probability of wrongly finding that at Drug X is more effective than the standard therapy as 1 %, they set the probability of wrongly finding that the effectiveness of the two drugs is the same as 10%. Which of the following is the most accurate estimate of the statistical power in this study?  
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* Re:Sample question :).
#3373840
  aricept123 - 10/19/18 12:52
 
  Alternatives:
1%
10%
40%
90%
99%
 
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* Re:Sample question :).
#3373861
  cardio69 - 10/19/18 16:43
 
  You tell me what part you don't understand & I'm will to help you:) You never learn if I always break it for you:)  
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* Re:Sample question :).
#3373870
  aricept123 - 10/19/18 17:10
 
 
I know that Power is equal to 1 - b error.
But here they are asking how to calculate the statistical power? Like it they are asking for a formula. I couldn't find a formula for how to calculate the power.
Are you preparing for step 3?
Thanks :).
 
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* Re:Sample question :).
#3373885
  cardio69 - 10/19/18 23:32
 
  Statistically, the probability of rejecting the null hypothesis when -> false. We generally as you mention denoted as what? -> 1 – beta? Right likelihood finding of a difference in fact actually exists…

Then if the “stat power” the likelihood that study can detect btw mean/btw group if 1 truly exists. So, as you mention you believe the mathematical of “POWER” = 1 – beta then, let have your math 101😊 check What's ans for 1- 0.1 =?
 
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* Re:Sample question :).
#3374037
  aricept123 - 10/24/18 11:39
 
  D :)!.  
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* Re:Sample question :).
#3374169
  cardio69 - 10/26/18 17:03
 
  (;  
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* Re:Sample question :).
#3374194
  knick01 - 10/26/18 20:24
 
  https://www.youtube.com/watch?v=8xb03_r58Qk&t=262s  
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