We all want rules of thumb even though we know they can be wrong, misleading or misinterpreted.

Rules of Thumb are like Urban Myths or like a bad game of ‘Telephone’. The actual message gets totally distorted over time.

For example, you may have heard this one: “The Chi-Square test is invalid if we have fewer than 5 observations in a cell”.

[Read more…] about Chi-Square Test of Independence Rule of Thumb: n > 5