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.
A law enforcement officerâs lifeline is his weapon. Guns for law enforcement must be powerful enough to stop criminals and accurate enough to help officers hit their mark.The quality of their guns can mean the difference between surviving to work another day and tragically dying in the line of duty.his is why law enforcement officers across the nation go to Remington for their shotgun needs. One of the most favored shotguns is the Remington 870. One of the reasons it is so heavily favored is they take the quality of their law enforcement firearms seriously.