Harvey Motulsky

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2,850 reputation

833

bio	website	graphpad.com
	location	Seattle, WA
	age	61
visits	member for	2 years, 10 months
	seen	3 hours ago
stats	profile views	328

I am the founder and CEO of GraphPad Software and the author of Intuitive Biostatistics.

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68 Answers

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43	What is your favorite “data analysis” cartoon?
34	Is normality testing 'essentially useless'?
12	What's the difference between correlation and simple linear regression?
12	What are alternatives to broken axes?
12	Negative values for AICc (corrected Akaike Information Criterion)

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2,850 Reputation

+5	What are the pros and cons of using the logrank vs. the Mantel-Haenszel method for computing the Hazard Ratio in survival analysis?
+10	What are the pros and cons of using the logrank vs. the Mantel-Haenszel method for computing the Hazard Ratio in survival analysis?
+10	Do we need a global test before post hoc tests?
+15	Nonlinear regression: Confidence intervals on transformed or untransformed parameters?

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8 Questions

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20	Origin of “5$\sigma$” threshold for accepting evidence in particle physics?
11	What are the pros and cons of using the logrank vs. the Mantel-Haenszel method for computing the Hazard Ratio in survival analysis?
8	Do you reject the null hypothesis when $p < \alpha$ or $p \leq \alpha$?
6	How to calculate the confidence interval of the mean of means?
5	Which algorithm to compute p-value of logrank test with three or more groups is best?

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88 Tags

29 anova × 8	19 hypothesis-testing × 5
26 regression × 6	17 mean × 2
23 statistical-significance × 6	16 post-hoc × 2
22 standard-deviation × 8	15 teaching × 6
19 r × 6	15 model-selection × 2

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