ATMathew

594 reputation

310

bio	website	amathew.com
	location	Denver, CO
	age
visits	member for	2 years, 3 months
	seen	15 hours ago
stats	profile views	74

I'm an aspiring statistician.

I also like R, Python, fitness, books, and a few other things.

	594 reputation	bio	website	amathew.com	visits	member for	2 years, 3 months
310 badges		location	Denver, CO		seen	15 hours ago

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104 Favorites

added views newest activity votes

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359

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Aggregation-Level in AB-Tests

jun 23 '11 at 17:24 Andy W 6,009

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428

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Multistage sampling in R

r sampling

jun 17 '11 at 17:37 mbq♦ 12.1k

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answers

kviews

Are large data sets inappropriate for hypothesis testing?

hypothesis-testing sample-size dataset large-data

jun 15 '11 at 14:16 probabilityislogic 9,370

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kviews

When are confidence intervals useful?

confidence-interval interpretation

jun 7 '11 at 12:24 Frank Harrell 8,024

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501

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Does the variable order matter in linear regression

regression outliers linear-model

may 16 '11 at 15:13 Greg Snow 15.5k

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kviews

Produce a list of variable name in a for loop, then assign values to them

may 16 '11 at 11:53 Bernd Weiss 3,714

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answers

kviews

Does simple linear regression imply causation?

regression correlation causal-inference

may 12 '11 at 18:16 B_Dev 486

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266

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Animating the effect of changing kernel width in R

r kernel

may 8 '11 at 10:44 Bernd Weiss 3,714

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answer

475

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How does a frequentist calculate the chance that group A beats group B regarding binary response

bayesian ab-test

may 6 '11 at 11:17 steffen 3,445

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answers

273

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“Interestingness” function for StackExchange questions

data-mining predictive-models

may 5 '11 at 1:16 Jonas 828

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answer

kviews

Interpreting logistic regression output in R

r logistic interpretation p-value

may 4 '11 at 15:15 Andy W 6,009

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answer

282

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How to calculate sample size for a one-sided test on a rxs contigency table

probability hypothesis-testing ab-test

may 3 '11 at 11:18 Jeromy Anglim 17.1k

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answers

kviews

How to calculate the “exact confidence interval” for relative risk?

confidence-interval epidemiology relative-risk

apr 29 '11 at 0:22 GaBorgulya 2,356

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answers

394

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Beginner to prediction/statistics: Where do I start?

forecasting longitudinal

apr 29 '11 at 0:08 Amanda Shankle-Knowlton 11

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answer

227

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Moving from conversion rates to sales volume in A/B tests

confidence-interval hypothesis-testing ab-test

apr 21 '11 at 15:05 lodonnell 11

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answers

415

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Validating a linear model with R, lm()

r regression

apr 13 '11 at 15:01 Wayne 4,641

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answers

kviews

Problems with pie charts

data-visualization pie-chart

apr 1 '11 at 15:50 deps_stats 737

votes

answer

364

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Looking for ideas to build a predictive model

r regression predictive-models

mar 29 '11 at 19:28 GaBorgulya 2,356

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answers

181

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Introduction to maths for a junior in epidemiology

books

mar 25 '11 at 12:14 Andy W 6,009

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490

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Chi-squared versus logistic regression

logistic chi-squared p-value

mar 24 '11 at 16:12 mbq♦ 12.1k

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kviews

Logistic Regression in R (Odds Ratio)

r logistic odds-ratio

mar 23 '11 at 14:39 Duke of Lizards 81

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answers

kviews

How to understand output from R's polr function (ordered logistic regression)?

r logistic

mar 17 '11 at 18:20 mBrewster 21

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answers

kviews

Best books for an introduction to statistical data analysis?

machine-learning bayesian books

mar 16 '11 at 22:48 whuber♦ 57.2k

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answer

489

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Sample size required to determine which of a set of advertisements has the highest click through rate

anova sample-size t-test rule-of-thumb

mar 15 '11 at 2:41 fgregg 615

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138

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Minimal number of samples/conversions for statistical validity

confidence-interval chi-squared cross-validation validation

mar 8 '11 at 11:31 chl♦ 27.2k

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answer

579

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How to determine statistical validity of results

statistical-significance chi-squared

mar 2 '11 at 17:14 whuber♦ 57.2k

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answers

766

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Number of trials required from a binomial distribution to get the desired odds

r binomial p-value

feb 13 '11 at 20:36 bill_080 2,095

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461

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What is the right statistical test to use when attesting claims like “60% people switched over from group A to group B”?

hypothesis-testing classification statistical-significance

feb 9 '11 at 4:24 cardinal 10.6k

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answer

644

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Non-parametric regression

r regression nonparametric genetics

jan 21 '11 at 17:19 probabilityislogic 9,370

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answers

kviews

What's the difference between a probability and a proportion?

probability

jan 13 '11 at 4:13 Community♦ 1