6,164 reputation
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bio website integrativestatistics.com
location Boston, MA
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visits member for 3 years, 11 months
seen 8 hours ago

19h
revised Analysing data on importance ratings
minor wording change
20h
answered Analysing data on importance ratings
20h
revised Analysing data on importance ratings
Ratings are distinct from rankings (this is 1st, this is 2nd, etc.) and need to be treated differently.
20h
comment How to analyze my Likert-scale data
If you have $19 and 2 hours to spend I highly recommend Paul Spector's little book at sagepub.com/books/Book3653 .
21h
comment Cross-Validation: how to choose k for small datasets (n=900)?
For better answers I suggest you say what classification procedure you're conducting. If it's predicting a binary outcome, how high is the incidence rate of that outcome? E.g., 90 cases would be insufficient if that rate is 10%.
21h
comment How to analyze my Likert-scale data
If you truly have no idea, then you must not have read any of the Related links on the right side of this page. That's a place to start. If you are struggling with a choice between two or more alternatives, please say something about that.
Nov
24
comment Testing and reporting interactions in multiple regression
Hint: compute the slope for z and non-z cases. Compare the difference between those slopes to the interaction coefficient you just obtained.
Nov
23
comment machine learning model with 50% chance to be deterministic
I like the first 1/2 of the answer. "looking at all your data to decide what features to include": if this approach were taken, then your point about cross-validation wouldn't apply, because this would not even be cross-validation. It would defeat the purpose of cross-validation.
Nov
22
answered Testing and reporting interactions in multiple regression
Nov
16
answered Factor loading and corrected item to factor correlation
Nov
14
awarded  Popular Question
Nov
12
comment Need Insight on Measuring Variable Effect
Consider the possibility that what you need is not an answer from some knowledgeable person who's at arm's length from the work, but either a consultant or a coach who can get to know in detail the data, your analyses thus far, and your level of understanding and analytic capabilities.
Nov
1
awarded  Tag Editor
Nov
1
revised heteroscedasticity wiki excerpt
Heteroscedasticity is a property, not a process.
Nov
1
comment How to test heteroskedasticity at the independent variable level?
What method would you use in the case of residuals, and why would that not apply for a predictor?
Nov
1
suggested suggested edit on heteroscedasticity tag wiki excerpt
Oct
31
comment Sample size calculation for non-normal data (possibly lognormal)
You seem to be saying that based on three observations/cases/data points/"numbers" you have determined the shape of the variable's distribution. And that using a power calculation you have determined that in order to achieve a certain level of power you will require not 3 but 2 cases.
Oct
31
comment Statistical analysis of variable data
Needs to be clarified and reorganized.
Oct
23
revised Best practice for visualizing a lift from zero?
edited tags
Oct
23
comment Best practice for visualizing a lift from zero?
I would say that what depends is not the limit of the ratio but one's interpretation of that ratio.