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visits member for 1 year, 11 months
seen Sep 13 '13 at 23:49

Oct
6
asked Is it possible to do this Poisson problem in Binomial?
Oct
5
accepted Performing hypothesis test for the difference of population means: paired comparisons
Oct
5
comment Performing hypothesis test for the difference of population means: paired comparisons
@MichaelChernick to summarize, I cannot use the 2 sample independent t test because there's a strong correlation (or dependence) between the two variables. The experimental design is better suited with paried comparisons. correct?
Oct
4
comment Why does negative binomial random variable uses ${n-1 \choose r-1}$ instead of ${n \choose r}$ as coefficient?
This is a good answer, Thank you! however what I don't understand is that with ${n-1 \choose r-1}$ aren't we skipping the last trial? It's a guaranteed success, but we shouldn't ignore it
Oct
4
comment Why does negative binomial random variable uses ${n-1 \choose r-1}$ instead of ${n \choose r}$ as coefficient?
i understand r-1 success in n-1 trial part, but the last trial must be a success then that makes it ${n \choose r}$... if we do ${n-1 \choose r-1}$ we lose the last trial!
Oct
4
comment Performing hypothesis test for the difference of population means: paired comparisons
@MichaelChernick why do you think using the formula for 2 sample t test is incorrect in this scenario? I think we can use it because has been used to determine difference of population means. my thoughts are, if anything, this and the paired t test should come to the same conclusion...
Oct
4
asked Why does negative binomial random variable uses ${n-1 \choose r-1}$ instead of ${n \choose r}$ as coefficient?
Oct
4
comment Performing hypothesis test for the difference of population means: paired comparisons
@MichaelChernick yes, thank you for answering, but it looks like you have discussed the topic in CV, but Im wondering what is CV...
Oct
4
comment Performing hypothesis test for the difference of population means: paired comparisons
Yes! an answer!!! Michael you're AWSOME!!!!
Oct
4
comment Performing hypothesis test for the difference of population means: paired comparisons
thanks for answering michael, what exactly is a CV?
Oct
3
revised Performing hypothesis test for the difference of population means: paired comparisons
edited title
Oct
3
revised Performing hypothesis test for the difference of population means: paired comparisons
edited title
Oct
3
revised Performing hypothesis test for the difference of population means: paired comparisons
added 20 characters in body
Oct
3
asked Performing hypothesis test for the difference of population means: paired comparisons
Sep
30
awarded  Cleanup
Sep
30
comment How do we identify a probability problem as a conditional probability problem?
@DilipSarwate minor math latex error
Sep
30
revised Craps game probability
rolled back to a previous revision
Sep
30
revised Craps game probability
deleted 69 characters in body
Sep
30
revised Craps game probability
added 133 characters in body
Sep
30
comment How do we identify a probability problem as a conditional probability problem?
@DilipSarwate if they had used the keyword "Given" it would've been much easier, but here it doesn't use the keyword "Given". What other clues should i look for?