To make sure the first wasn't an abnormality.
Repeated trials.
because they use the effect on probability.
repeated trials
If , in the course of your experiment, you run repeated trials with differing results, it is necessary to ensure that only one variable is changing for each experiment. Recheck the data collected for errors.
Trials are the amount of times a certain experiment is repeated.
data from repeated trials of the experiment
Repeated Trials
A large number of repeated trials.
Experimental Probability
repeated trials
Repeated trials of said experiment.
The relative frequency of an event, from repeated trials, is the number of times the event occurs as a proportion of the total number of trials - provided that the trials are independent.