When faced with the unknown, we form assumptions based on what we know from previous experience. In science, it is fancier to call those assumptions as hypotheses. And hypotheses are meant to be tested. Those whom have done sufficient level of statistics will quickly understand this as hypothesis testing and at the very basic level, […]

I was running some regressions at work just now and I realized my overdependence on computers had made me forgotten how to calculate certain statistics manually. Modern regression softwares automatically calculate various statistics less than a second and I hardly think of what happens in that virtual blackbox. But just now, I was following up […]