For example, dry and pourable bulk samples can be fed to rotating dividers through vibratory feeders, whereas sample splitters are more suitable for heavily flowing materials. RETSCH offers a line of ...

Describe how pollsters use representative samples of people to gather data about the country. What challenges do pollsters face in trying to find representative samples?

Obtaining representative samples of fly ash from very large flue gas ducts remains the largest challenge. For example, a typical 500-MW coal unit firing 8% ash content fuel will be passing about ...

For example, a nationally representative sample of 1,000 Americans wouldn’t include enough people to support reliable estimates for many small groups, such as Muslims or Korean Americans. One way to ...