Percentages: The most useful statistics ever invented

The lower 95% confidence bound is, of course, 0. So for our example you could be 95% confident that the interval from 0% to 10% (300/30 = 10) “captures” the percentage of adverse events in the population from which the sample has been drawn. There is nothing special about a 95% confidence interval, other than the fact that it is conventional. ................
................