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#1
04-21-2016
 USMLE Forums Scout Steps History: Not yet Posts: 16 Threads: 6 Thanked 2 Times in 2 Posts Reputation: 12
Biostatistic and confidence interval

Can anybody PLEASE explain me this part in FA P54.

If the 95% CI for a mean difference between 2 variables includes 0, then there is no signicant difference and H0 is not rejected.

If the 95% CI for odds ratio or relative risk includes 1, H0 is not rejected.

If the CIs between 2 groups do not overlap statistically signicant difference exists.

If the CIs between 2 groups overlap usually no signicant difference exists.

The bold part is what i am confused.

Thanks for the help.

#2
04-21-2016
 USMLE Forums Scout Steps History: Step 1 Only Posts: 52 Threads: 6 Thanked 10 Times in 9 Posts Reputation: 20

Quote:
 Originally Posted by erickven Can anybody PLEASE explain me this part in FA P54. If the 95% CI for a mean difference between 2 variables includes 0, then there is no signicant difference and H0 is not rejected. If the 95% CI for odds ratio or relative risk includes 1, H0 is not rejected. If the CIs between 2 groups do not overlap statistically signicant difference exists. If the CIs between 2 groups overlap usually no signicant difference exists. The bold part is what i am confused. Thanks for the help.
Have u watched the kaplan video on this topic?Or if u do at least have the kaplan BSS book,u will understand.It's on pg 22(2015 edition).The diagram makes it easy to understand what they mean.
 The above post was thanked by: erickven (04-21-2016)
#3
04-21-2016
 USMLE Forums Scout Steps History: Not yet Posts: 16 Threads: 6 Thanked 2 Times in 2 Posts Reputation: 12

I found the answer here. Thank you!!!

The Zero value in Confidence interval?

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