Computation times

00:02.137 total execution time for 4 files from auto_examples/statistics:

Example	Time	Mem (MB)
Outlier detection with DBSCAN and spline regression (plot_remove_outliers.py)	00:01.215	0.0
Pearson correlation (plot_pearson_correlation.py)	00:00.354	0.0
Outlier detection with DBSCAN and spline regression 001 (plot_detect_outliers_001.py)	00:00.295	0.0
Outlier detection with DBSCAN and spline regression 002 (plot_detect_outliers_002.py)	00:00.274	0.0