44,792 reputation
842107
bio website statisticalanalysisconsulting…
location New York, NY
age 55
visits member for 4 years, 2 months
seen yesterday

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.


2d
reviewed No Action Needed For Y~B(11, 0.3) what is P(|Y-5| >= 3)?
2d
reviewed Reopen Gaussian mixture vs. Gaussian process
2d
reviewed Leave Closed Systematic Review (maybe)
2d
comment Regression Modeling with Upper and Lower Bounds on target distribution
There is a paper called A better lemon squeezer that may be of use. It covers the uses of beta regression in several situations and, if I recall, some of them are like yours.
Oct
21
comment wondering about Negative alpha cronbach
Yes, that's what I think you should do.
Oct
21
answered wondering about Negative alpha cronbach
Oct
20
reviewed No Action Needed Regarding Nested Anova in R
Oct
20
reviewed No Action Needed Predict Seasonal Variations
Oct
18
comment Linear regresson lm or stepwise regression here using R?
The graphs are used to check that the assumptions of the linear model are met, so they are useful in any regression problem, but I don't see a <i>specific</i> use for them here
Oct
18
answered Linear regresson lm or stepwise regression here using R?
Oct
18
awarded  Taxonomist
Oct
17
reviewed Reopen Getting the 1 and 3 years overall and progression-free survival (OS&PFS) and their p values in SPSS
Oct
17
reviewed Reviewed How to apply the output layer function in a neural network
Oct
16
reviewed Close Canonical discriminant analysis - lack of equality of covariance matrices
Oct
16
reviewed Leave Open Logistic Regression - Non normal distribution
Oct
15
awarded  Nice Answer
Oct
14
revised What causes non-normality of the error term in OLS?
added 323 characters in body
Oct
14
comment What causes non-normality of the error term in OLS?
OK, I guess if you think it could be ambiguous, it could be. I haven't run into that before when I say things like this to my clients, but maybe it takes a greater degree of sophistication to see the ambiguity.
Oct
13
comment What causes non-normality of the error term in OLS?
I am referring to one of the basic assumptions of OLS regression, that the errors are normally distributed. But of course we can't know the errors, so we use the residuals. And, to test the assumptions, we often use things like quantile normal plots to see if the residuals are normally distributed. It doesn't really seem to need clarification, to me, unless one is trying to misunderstand it.
Oct
13
comment Interactions in Propensity Score Models
How are you using the propensity scores? Are you matching on them or using them as a covariate?