Welcome

What are you trying to do?

Something I need to watch regularly in agriculture and food science.

Before you start. Monitors currently run from the command line rather than from a page. The engine works and is tested; the interface for setting them up is still being built, so this route is the least finished of the four.

Your path

Create the study

One study holds the whole series.

Chart it before you judge it

A control chart separates ordinary variation from a real change. Most month-to-month movement is noise, and acting on it makes a process less stable rather than more.

Set up a monitor

A saved analysis with a cadence. It re-runs and reports what moved, without claiming the movement is significant - two consecutive estimates are not independent samples.

Read the series, not the last point

Twelve points tell you what one never can.

What people in your field ask

In agriculture and food sciencethe full guide

Block the field - randomise treatments to plots - analyse at the plot level - separate the means.

Which variety or treatment yielded best?one way anova
Two factors at once - variety and fertiliser?factorial anova
My field slopes. Does that ruin the trial?factorial anova
Does the treatment relate to a continuous measure?correlation matrix
How long does the produce keep?kaplan meier

Watch for: Treating fifty plants from one plot as fifty observations. Randomisation was applied to plots, so the plot is the experimental unit and counting plants inflates n dramatically.

Create your first study The full guide for agriculture and food science Start again