pearljam59
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In a cohort study, 10,000 men who consume alcohol were compared with 10,000 men who do not consume alcohol. The results show that men who consume alcohol have an increased risk for cancer of the bladder that is statistically significant at the 5% level. Which of the following is the most appropriate interpretation of this result?
A. At least 5% of the bladder cancers can be attributed to consumption of alcohol
B. At least 5% of consumers of alcohol will develop cancer of the bladder
C. Such an effect would occur by chance in less than 5% of repeated samples of this size
D. There is at least a 5% increased risk for bladder cancer among consumers of alcohol
E. Men who drink alcohol are 5 times more likely to develop bladder cancer than those who do not drink alcohol
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| skyhigh
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C , b/c it is an alpha error.
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| robin082006
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C
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| yasmeen
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c is the right ans
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| hrishi
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i think u guys are genius.u seem to be knowing abt every single thing while i am struggling to understand the basic concepts. can someone enlighten me as to what material to read for stats .
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| penshoppe
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can anyone explain why C. thanks so much.
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| pearljam59
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Since the study is statistically significant at the 5% level then it is just a simple definition of the probability of making a type 1 error ie there is a 5% chance the data WILL show something that is not really there.
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| Addicudo
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Need an explanation to this question ... !! This iwll def coe up in the exam .. p value stuff .. and I know little about this .
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| rock
Forum Elite
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the answer is C.
p value is used to interpret statistical studies...we just need to know how to interpret it.
the p value criteria is conventionally set at p< or = .05
here the hypothesis is that people who consume alcohol get bladder cancer so the null hypothesis is that they do not.
so if p less than or equal to .05, we reject the null hypothesis i.e. people who consume alcohol do not get bladder cancer and if p is greater than .05 we accept the null hypothesis.
here P=.05, so we reject the null hypothesis so people who consume alcohol do get more bladder cancer and the chance this study is wrong is 5%...so the association is strong i.e. 95%...
i hope i was able to make this clear...
Edited by rock on 05/23/07 - 09:49 AM
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| dncosta
Licensed, finally
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C
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| doc179
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Thanx rock, looks like I am getting it a lot better now.
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| Addicudo
Forum Guru
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Thanks a lot dude...
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| rock
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happy to be of help
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