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  #1  
Old 04-05-2011
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Arrow High Yield Question #9

Two cross sectional studies were conducted using different questionnaires to determine the prevalence of over the counter analgesics use in a population. The first study showed the prevalence of 7.5% (95% confidence interval 6.0-9.0), and the second study demonstrated the prevalence of 7.3% (95% confidence interval 6.9-7.6). If the true prevalence of over the counter analgesics use in the population is 7.4%. Which of the following statements about the results of the study is the most accurate.

A) The first study results are more specific
B) The second study results are more sensitive
C) The first study results are more valid
D) The first study results are more accurate
E) The second study result are more precise
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  #2  
Old 04-05-2011
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I would choose E
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Old 04-05-2011
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NARROW 95%CI...

E) The second study result are more precise
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I choose E
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Old 04-05-2011
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Arrow E) The second study result are more precise

Correct ans is E) The second study result are more precise

Mondoshawan posted an excellent diagrams depict the actual steps that explain the answer regarding this qn. This is very helpful to understand the different b/w precise and accuracy of the study and also explains the reliability and validity respectively.

Precision is the measure of random error in the study. The study is precise, if the results are not scattered widely (Diagram B), that is reflected by a tight confident interval. Note: increasing the sample size will increase the precision.
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  #6  
Old 04-06-2011
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where are these questions from? either they're kinda easy or I'm really underestimating of how much i know!
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Old 04-06-2011
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Quote:
Originally Posted by Dr_Kal_El View Post
where are these questions from? either they're kinda easy or I'm really underestimating of how much i know!
Well, having just taken the step, perhaps what aktorque feels to be high-yield rings a bell somehow in terms of representative concepts...
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Old 07-26-2011
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Star E

E) The second study result are more precise
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Old 07-26-2011
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the answer is E
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Old 03-30-2017
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Ans is E. Important concept,thanks
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Old 04-15-2017
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Quote:
Originally Posted by bebix View Post
NARROW 95%CI...

E) The second study result are more precise
What is wrong with D
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Old 04-17-2017
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i will be going with E
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Old 04-17-2017
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The second study result are more precise
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Old 4 Weeks Ago
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Default It is E

I think the right answer is E
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Biostatistics-Epidemiology, Figures-, Step-1-Questions

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