TY - JOUR T1 - Article 5. An introduction to estimation—2: from z to t: Figure 1 JO - Emergency Medicine Journal UR - https://doi.org/10.1136/emj.18.1.65 PY - 2001/01/01 AU - Driscoll P AU - Lecky F ED - DO - DOI: 10.1136/emj.18.1.65 PB - BMJ VL - 18 IS - 1 SP - 65 EP - 70 Y2 - 2025/11/28 ER -