RT Journal Article SR Electronic T1 Statistics from the inside. 2. Significance tests. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 1457 OP 1458 DO 10.1136/adc.66.12.1457 VO 66 IS 12 A1 Healy, M J YR 1991 UL http://adc.bmj.com/content/66/12/1457.abstract AB