It’s the number of standard deviations from the mean. So he thought it would be +1.3 but was +0.7. So it was worse than he expected and not much better than mean. Michael has done analysis on historic weather to create a bell curve. And probably all other statistical analysis methods available.
@wheels_of_fire perhaps no perfect. But the higher the z value the closer to perfect!
It’s the number of standard deviations from the mean. So he thought it would be +1.3 but was +0.7. So it was worse than he expected and not much better than mean. Michael has done analysis on historic weather to create a bell curve. And probably all other statistical analysis methods available.
@wheels_of_fire perhaps no perfect. But the higher the z value the closer to perfect!