public static void main(String[] args) {
final PercolationStats stats = new PercolationStats(200, 100);
System.out.println("mean = " + stats.mean());
System.out.println("stddev = " + stats.stddev());
System.out.println(
"95% confidence interval = " + stats.confidenceLo() + ", " + stats.confidenceHi());
}
