Commit 55c5b8da authored by Robert Ricci's avatar Robert Ricci

Add notes about picking dispersion

parent c8be0906
......@@ -44,6 +44,7 @@
\1 Mean, median, mode
\2 \textit{When to use each}
\2 Categorical: mode, total: mean, skewed: median, else: mean
\1 Covariance
\2 Measure whether two random variables vary together
......@@ -70,7 +71,13 @@
\1 TODO: Means of ratios
\1 TODO: Picking index of dispersion
\1 Picking index of dispersion
\2 Range (when bounded)
\2 Var or stddev (sttdev is in the right units) --- see also CoV
\2 Percentiles - 10 and 90, or 5 and 95 (want a sense of how long
things will take in extreme case
\2 SIQR (semi interquanile range): middle 50% / 2: very outlier-robust
\2 Mean absolute dev (use least)
\1 Quantile-quantile plots
\2 For each quartile: plot pairs of what the theoretical distribution
......
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