In an investigation of the physiological effects of alcohol
(ethanol), 15 mice were randomly allocated to three treatment groups,
each to receive a different oral dose of alcohol. The dosage levels
were 1.5, 3.0, and 6.0 g alcohol/kg body weight. The body temperature
of each mouse was measured immediately before the alcohol was given
and again 20 minutes afterward. The accompanying data shows the drop
(before minus after) in body temperature for each mouse. (The negative
value - 0.1 refers to a mouse whose temperature rose rather than
fell.)