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visits member for 2 years, 7 months
seen Jan 26 at 9:36

Learner.


Jan
26
comment How to calculate probabilities when there is censoring?
Thank you gung. But if the 2 patients got censored due to some other reason (left the study) within the study period? Should the probability estimate be 0.4 in that case?
Jan
24
comment How to calculate probabilities when there is censoring?
Actually in this clinical trial patients will either remit or will fail to remit (meaning death before remission). Some patients will get censored before remission. In the case described in the question 4 patients achieved remission, 4 people died without achieving remission and 2 people got censored before remission.
Jan
22
comment Conditional probability of an event given two independent events
The other think I am still struggling to understand is: how the assumption that "the solving times of any non-solvers are larger than any of the actual solving times" helped us get the right probability. Could you please explain it in plain language for me? I'm grateful for your kind help. Thanks a lot.
Jan
22
comment Conditional probability of an event given two independent events
Dear whuber, thanks for your brilliant solution to this problem. In fact the verification of the answer was so nice of you! I was thinking the probability will be something like: $\frac{P(\text{k gets the next task)}}{\text{P(k solves the problem)}\text{P(there are at least j solvers)}}$. Could you please tell me why we didn't need something like that in the denominator? Are these two conditions automatically satisfied?
Jan
22
accepted Conditional probability of an event given two independent events
Jan
19
revised Conditional probability of an event given two independent events
Rephrased the question.
Jan
17
asked Conditional probability of an event given two independent events
Jan
13
asked How to calculate probabilities when there is censoring?
Nov
25
awarded  Popular Question
Oct
27
comment Could you please suggest a newbie about publishing Statistics related papers?
Oh thank you for your comments. I'll try academia.stackexchange.com. Thank you.
Oct
23
revised Could you please suggest a newbie about publishing Statistics related papers?
added 122 characters in body
Oct
23
asked Could you please suggest a newbie about publishing Statistics related papers?
Oct
23
comment Analysis of a longitudinal study where interventions are received at different time points
@whuber I would also like to know your thought.
Oct
23
comment Analysis of a longitudinal study where interventions are received at different time points
@Andy, The main problem that I am facing is that the same program was received at different times by the students. So, I may calculate the CGPA before and after the program for the program receivers but how can I calculate the same for the non-receivers? Otherwise is it possible to compare the these two groups? Without a fixed time point of implementing the program, how can I find a before and after CGPA for control group who did not receive any program?
Oct
21
comment Analysis of a longitudinal study where interventions are received at different time points
Yes Andy, there are some, actually they consider several things. But can we see if the effect was instant but temporary or instant and durable or delayed but durable or delayed but temporary with regression discontinuity design?
Oct
20
comment Analysis of a longitudinal study where interventions are received at different time points
Since these programs are there for years, it's really difficult to find a sharp cut-off. Thanks Andy.
Oct
20
comment Analysis of a longitudinal study where interventions are received at different time points
@whuber you are right about it. Unfortunately we have only this now and definitely it is not a typical treatment-control version. The study is retrospective in nature. We have planned to compare the receivers of these programs to a dummy control group created by propensity score matching using some background variables- I think that is what we can do at best now. The fact that really very few have received more than one program, keeps our hope alive! I am wondering what kind of model we should use to find the above mentioned aspects from this data.
Oct
20
asked Analysis of a longitudinal study where interventions are received at different time points
Oct
11
awarded  Notable Question
Sep
24
awarded  Autobiographer