CLICK TO RETURN TO msds procedure If 300 test rats receive the LD50 oral rat dose, then 150 rats are expected to survive and 150 are expected to die. Roughly half of the test sample population is expected to survive. The numbers will not be 'exactly' 50 % because survivibility differs for each individual. The average survial numbers will be close to 50%, So out of 300 the expectation is that the number of survivors will be somewhere between 140 and 160. |