Tagged Questions
0
votes
1answer
34 views
How to understand the variance in this setting?
All -
I have a dataset originated from a practical setting, but it is not clear to me how to interpret it. Let me try to frame the setting and see if it makes sense:
A manufacturer produces a type ...
4
votes
3answers
177 views
How to describe the differences in skewed data with same median but statistically different distribution?
I am comparing length of stay after laparoscopic and open appendectomy in over 160000 patients. LOS is typically a skewed variable so I use the median and interquartile range and ranksum test to ...
3
votes
1answer
138 views
Am I using the wrong statistical test?
I am using $\chi^2$ to analyze a set of data gathered over 4 time periods. The two variables are independent--each 'event' is categorized as 'good' or 'bad'. We want to prove that the intervention ...
1
vote
3answers
575 views
Statistical test suitable for small dataset (n=25)
I have a dataset of cases and age & sex matched controls (n=25). I need to do a statistical test to find the significantly different incidences of ICD-9 codes using a p-value or similar measure.
...
