Figure 1.
Simulation of the effects of comparing 15 cells drawn from 3 animals. (A) Values of three selected animals in each group. In each group, three animal values were drawn from a normal distribution: mean 1.0; SDanimal, 0.3. The means of the three points are shown by the horizontal black lines. A t test shows no significant difference. (B) The same three animals have been selected, and from each animal five cells (open circles of the same color as the animal in A) were drawn using a normal distribution, with a mean given by the animal value and SDcell of 0.3. The mean values of the 15 cells are denoted by the horizontal black lines. A t test shows a significant difference.