To find out if the ___ glassware agreement among a group of data, but says really is the most precise/accurate?

To find out if the ___ glassware agreement among a group of data, but says really is the most precise/accurate? Is it nothing about their relationship to the true enough to use one piece of glassware or value. Three measurements of 100.009, should several kinds/styles be tried? Is it 100.008, and 100.007 g might be more enough to take one reading on each piece of precise than three measurements of 100.009, glassware or should several tests/trials be 100.002, and 99.995 g, and yet may not be performed on each piece?