44,509 reputation
841106
bio website statisticalanalysisconsulting…
location New York, NY
age 55
visits member for 4 years, 2 months
seen 3 hours ago

I'm a statistical consultant to graduate students and researchers in fields including the behavioral and health sciences. I've assisted with review of articles, and with preparation of grants, dissertations and papers.


3h
comment For plotting with R, should I learn ggplot2 or ggvis?
@NickCox I answered one of the questions that are in the question. :-).
18h
awarded  Sheriff
1d
comment Why is the intersect negative and what does my regression show
Good point @whuber I assumed the units were sensible, but often they are not. I was thinking dollars (units) and subscribers (units) but (as I know from clients!) people do weird things sometimes.
1d
awarded  Explainer
1d
awarded  Refiner
1d
comment Why is the intersect negative and what does my regression show
I don't know any software that meets both those requirements, but doing a linear regression is pretty easy in any software - R, SAS, SPSS.... Whatever you have. R is free, which is nice. If the lowest value is not far from the mean, then that variable is very skew. Taking log of revenue might be good. Hard to tell without seeing the scatterplot
1d
answered Why is the intersect negative and what does my regression show
1d
comment Discrete Variables and Regression
Just a note to add to @greg snow's response: Most (if not all) statistical packages will make these dummy codes for you. Certainly SAS, R and SPSS will
1d
comment Help with regression
No, it isn't. N = 15. There is one regression.
2d
reviewed Reopen Regression shows positive linear relationship. Then why this negative equation
2d
comment Help with regression
You should have 3 variables: Word, know, and fixation
2d
comment Help with regression
No. Only one regression.
2d
answered Ordinal variables relation analysis
2d
answered Help with regression
Sep
28
answered For plotting with R, should I learn ggplot2 or ggvis?
Sep
28
reviewed Close Hmisc::describe not working with dataframe
Sep
28
reviewed Leave Closed Comparing non nested models
Sep
28
reviewed Leave Open data analysis, dissertation of thesis? help please?
Sep
28
reviewed No Action Needed Hmisc::describe not working with dataframe
Sep
28
revised which statistical sampling technique to employ to have a representative sample
Added detail, fixed tags