procedure TForm1.FormCreate(Sender: TObject);
begin
// Chart1BoxAndWhiskerSeries1.ListSource.YCount := 5;
Chart1BoxAndWhiskerSeries1.AddXY(0, 0.5, 1.0, 1.5, 1.9, 2.7); // specialized for TBoxAndWhiskerSeries
Chart1BoxAndWhiskerSeries1.AddXY(1, 0.5, [1.0, 1.5, 1.9, 2.7]); // valid for all series types
end;