The Tightness test

[Julio88]

The tightness test is a tool used in the context of lotteries to measure how closely the numbers generated by the lottery machines conform to the expected frequency. A "tight" machine is one that draws numbers with exactly the same frequency as expected, whereas a "loose" machine is one that generates numbers that deviate from the expected frequency. The assessment obtained through the tightness test can be used to improve the fairness and integrity of the lottery by identifying machines that might need to be fixed or adjusted.

 

[James108]

It is a term used in the lottery industry to describe a strategy for spotting potential winning numbers. The idea behind the test is that, over time, certain numbers will appear more often than others.