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What is the difference between ordinal, interval and ratio variables? Why should I care?
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How can I determine the Kcat of an enzyme?
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What is the difference between correlation and linear regression?
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How can I compute a one-sided confidence interval?
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When does it make sense to use repeated measures two-way ANOVA?
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Why use n-1 when calculating a standard deviation?
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Is it better to plot graphs with SD or SEM error bars? (Answer: Neither)
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Generating random numbers with Excel
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How to use GraphPad programs under Windows Vista or Windows 7
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Difference between "planned comparisons", "post-hoc tests", "multiple comparison tests" , "post tests", and "orthogonal comparisons".
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One-way ANOVA computes a P value <0.05 (significant effect of treatment), but a Tukey multiple comparisons test finds no statistically significant differences between any pairs of means. Is this a contradiction?
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t tests after one-way ANOVA, without correction for multiple comparisons
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Graph tip - How can I plot an odds ratio plot, also known as a Forest plot, or a meta-analysis plot?
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Which test should I use to determine the statistical significance of a 2x2 contingency table? Chi-square? Fisher's exact test? Something else?
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What's new in Prism Windows 5.02 and Prism Mac 5.0b?
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How do I decide between the Tukey and Newman-Keuls multiple comparison test?
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The confidence interval of a standard deviation.
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How does Prism compare the slopes of linear regression lines? If there are three or more lines, how can I account for multiple comparisons?
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How do the three methods compare to survival curves (log-rank, Mantel-Haenszel, Gehan-Wilcoxon) differ?
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P values from statistical ratios using Excel
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