In Sandy's experiment, it is most likely that the results of the virtual coin toss app showed that the number of heads and tails were roughly equal for each of the 100, 500, and 1,000 coin flips. This is because a fair coin has a 50/50 chance of landing on heads or tails, and over a large number of flips, the number of heads and tails should approach equal. However, it is also possible that the results showed some deviation from this equal distribution, as there will always be some degree of randomness in the outcome of coin flips.