If we are discussing clinical trials of a pharmaceutical or medical device then the greater the number of trials:
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The number of trials is important to a science experiment. The more times you do the experiment, the more meaningful your data will be.
1 - 2 answers 2 - probabilty of success remains constant 3 - outcomes of trials are independent 4 - random variable of interest is the number of successes in a fixed number of of trials
Number of trials is how many times you test your hypothesis. When you are doing trials the end result may come out differently every time.
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.
If the outcomes of the trials are equally likely, then (and only then) is it the number of favourable outcomes and the total number of trials.