[Statistics for those in their 50s] What is 'free' about 'degrees of freedom'? Reviewing the chi-square test in 30 minutes before work

October 13th.Today, before work, I opened my workbook for the Grade 2 Statistics Certification exam for just 30 minutes.I ...

[Statistics from your 50s] 40 minutes at the dining table. A Friday where the meaning of degrees of freedom 'm+n-2' became a little clearer

October 9th, Friday.For the first time in a while, I spread out my textbook and problem set on the dining table.I started today intending to study for about an hour. For the past few days, I've been ...