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Ray Koopman's user avatar
Ray Koopman's user avatar
Ray Koopman's user avatar
Ray Koopman
  • Member for 11 years, 7 months
  • Last seen more than 10 years ago
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Top posts
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31
Why could centering independent variables change the main effects with moderation?
Jul 29, 2013
answer
24
What does the inverse of covariance matrix say about data? (Intuitively)
Oct 22, 2013
answer
10
Calculate uncertainty of linear regression slope based on data uncertainty
Oct 4, 2013
answer
7
What if interaction wipes out my direct effects in regression?
Oct 10, 2013
answer
7
Is chi-squared always a one-sided test?
Sep 11, 2013
answer
7
Variance and covariance of binary data
Aug 13, 2013
answer
6
Spherical platykurtic random cloud
Dec 21, 2013
answer
6
How to report the ratio of two sets of experimental results?
Nov 29, 2013
answer
6
Are there useful applications of SVD that use only the smallest singular values?
Jul 19, 2013
answer
5
Generate three random numbers that sum to 1 in R
May 15, 2013
Top network posts
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28
Partitioning a list of numbers the Mathematica way
26
Uniformly distributed n-dimensional probability vectors over a simplex
20
Elegant high precision `log1p`?
17
Finding the volume of a sphere using the Monte Carlo algorithm
17
Looking for a way to insert multiple elements into multiple positions simultaneously in a list