### Questions (26)

 76 Does the variance of a sum equal the sum of the variances? 31 What test can I use to compare slopes from two or more regression models? 24 What is the meaning of the semicolon in $f(x;\Theta)$? [duplicate] 19 Calculating required sample size, precision of variance estimate? 17 When would it be appropriate to report variance instead of standard deviation?

### Reputation (3,191)

 +20 Does the variance of a sum equal the sum of the variances? +10 Calculating required sample size, precision of variance estimate? +20 What should a graduate course in experimental design cover? +10 What test can I use to compare slopes from two or more regression models?

 11 Does the variance of a sum equal the sum of the variances? 8 Slope of a line given multiple points 5 Does the distribution $\log(1 + x^{-2}) / 2\pi$ have a name? 2 How can I generate a plot similar to that produced by plot.bugs and plot.jags from an mcmc.list?

### Tags (44)

 10 r × 6 2 data-visualization × 3 8 regression 2 bugs × 2 8 excel 2 jags 5 probability × 7 0 variance × 7 5 distributions × 5 0 estimation × 4

### Bookmarks (1)

 30 What's a good way to use R to make a scatterplot that separates the data by treatment?