A t-test can be used to account for the uncertainty in the sample variance when the sample size is small and the data are exactly normal. There is no universal constant at which the sample size is generally considered large enough to justify use of the plug-in test. Typical rules of thumb range from 20 to 50 samples.
Each symbol and color in the National Law Enforcement Explorers seal has special significance. 1  The circular form of the seal represents continuous existence. 2  The dominant blue field represents justice. 3  The inner circle contains a shield surmounted by an eagle.
The Color of Justice. Â© Constitutional Rights Foundation 1. The Color of Justice. A justice system which tolerates injustice is doomed to collapse. â Leonard Noisette, quoted in Reducing Racial Disparities in the Criminal Justice System. (2000) In 1991 in Los Angeles, a bystander videotaped police officers beating Rodney King, a black. man, after a car chase.