[Statistics from your 50s] The degrees of freedom were 3... or so I thought! Discovering the source of the 'mean of 2' thanks to AI

October 14th.Today, before work, I opened my Statistics Grade 2 workbook again.I had about 10 minutes to spare. Today, I ...

[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 ...