final JFreeChart chart = ChartFactory.createXYLineChart(
"Normal distribution of " + column.getName(), column.getName(), "", dataset,
PlotOrientation.VERTICAL, false, true, false);
ChartUtils.applyStyles(chart);
Marker meanMarker = new ValueMarker(mean.doubleValue(), WidgetUtils.BG_COLOR_BLUE_DARK,
new BasicStroke(2f));
meanMarker.setLabel("Mean");
meanMarker.setLabelOffset(new RectangleInsets(70d, 25d, 0d, 0d));
meanMarker.setLabelFont(WidgetUtils.FONT_SMALL);
chart.getXYPlot().addDomainMarker(meanMarker);
final ChartPanel chartPanel = new ChartPanel(chart);
displayChartCallback.displayChart(chartPanel);
}