Treatment
Topic of Studies, data, and evidence, part of Data analysis
Treatment
| Type | Topic |
| Taught in | Studies, data, and evidence |
| Part | Data analysis |
| Questions using it | 8 |
The condition an experimenter assigns to a unit: a drug, a dose, a fertiliser, a teaching method. Comparing responses across treatments, with the assignment randomised, is what lets a designed experiment support a causal conclusion that an observational study cannot.
In Studies, data, and evidence
In a designed experiment some columns are controlled. Treatments are assigned to units, often at random, and those assignments stay the same if the measurements are repeated. The response column changes; the treatment column does not.
Used in
- Taught in Studies, data, and evidence
- Also used in Analysis of variance · Analysis of variance examples
- Questions that use it (8) — Heart rates in four age groups · Tips and coupons · Two treatments in blocks · Alice’s heart-rate changes · What a randomised trial does not need to record · Facial tumours in Tasmanian devils (answer) · Haemoglobin and sickle-cell type · Five treatments, ten pairs
- All 6 questions on Studies, data, and evidence
See also
Designed experiment · Blinding and placebo · Contrast · One-way analysis of variance · Randomised block design · Randomised controlled trial · Observational study · Confounding variable