 
* Sample question :). 
 #855078 




A randomized controlled trial is conducted to assess the effectiveness of a new combinationdrug antihypertensive singledrug 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 :). 
#3373870 


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 


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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