User Ralph Winters - Cross Validated

Ralph Winters

Member for 12 years, 10 months
Last seen more than a month ago

linkedin.com/in/ralphwinters
New York, New York, United States

35 Answers

Score Activity Newest

9 votes

Accepted

How to define number of clusters in K-means clustering?

answered Mar 31, 2011 at 19:09

8 votes

Accepted

Best way to put two histograms on same scale?

answered Mar 3, 2011 at 16:55

7 votes

Software for easy-yet-robust data exploration

answered Apr 3, 2011 at 3:07

6 votes

What skills are required to perform large scale statistical analyses?

answered Mar 6, 2011 at 20:31

6 votes

Accepted

A "systematic" part of a random time series component?

answered Jan 30, 2011 at 22:16

6 votes

Accepted

Exponentially weighted moving linear regression

answered Apr 25, 2011 at 15:18

5 votes

What are the software limitations in all possible subsets selection in regression?

answered Mar 1, 2011 at 14:56

4 votes

Accepted

How should I measure the relationship between a variable containing text and a binomial variable?

answered Mar 15, 2011 at 2:13

3 votes

Conducting correlation and one way ANOVA using data from a PostgreSQL database

answered Apr 27, 2011 at 16:02

3 votes

Why exactly does a classifier need the same prevalence in the train and test sets?

answered May 9, 2022 at 15:47

3 votes

How to generate user-friendly summaries of cluster analysis?

answered Mar 3, 2011 at 13:43

3 votes

What is the meaning of a gold standard?

answered Apr 4, 2011 at 15:47

2 votes

Accepted

Appropriate test to compare online voting data

answered Feb 14, 2011 at 16:51

2 votes

Is the method of mean substitution for replacing missing data out of date?

answered May 23, 2011 at 15:03

1 vote

Accepted

RFM Customer segmentation - Why Avg monetary value instead of total monetary value?

answered May 23, 2022 at 15:34

1 vote

Data preparation for regression

answered Mar 29, 2011 at 14:11

1 vote

Problems with pie charts

answered Mar 30, 2011 at 16:50

1 vote

Taking the mean of a data set with a skewed distribution

answered May 2, 2011 at 15:22

1 vote

These two variables are almost uncorrelated. What else can I say?

answered May 2, 2011 at 17:55

1 vote

Does the Central Limit Theorem allow one to create confidence intervals from a web traffic dataset?

answered May 6, 2011 at 18:10

1 vote

What are the text-mining packages for R and are there other open source text-mining programs?

answered Feb 14, 2011 at 21:44

1 vote

Binary classification when many binary features are missing

answered Mar 10, 2011 at 21:50

1 vote

Assumptions of cluster analysis

answered Mar 11, 2011 at 14:17

0 votes

How to visualize the true dimensionality of the data?

answered Mar 9, 2011 at 20:11

0 votes

Creating an index of quality from multiple variables to enable rank ordering

answered Apr 8, 2011 at 16:22

0 votes

From an email address to a quasi-random number

answered Feb 16, 2011 at 14:25

0 votes

Checking the distribution of classes in a sample of a dataset

answered Feb 17, 2011 at 18:25

0 votes

Feature selection for classification, controlling for sub-population

answered Mar 3, 2011 at 15:48

0 votes

Percent error or percent difference?

answered Mar 3, 2011 at 19:07

0 votes

Can one cluster web log data without performing user or session identification?

answered May 11, 2011 at 20:07

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