Examlex
A basketball coach wants to know how many free throws an NBA player shoots during the course of an average practice. The coach takes a random sample of 43 players and finds the average number of free throws shot per practice was 225 with a standard deviation of 35. Construct a 99% confidence interval for the average number of free throws in practice.
Earth's Crust
The outermost layer of Earth, comprising both continental and oceanic crust, and forming the solid surface of the planet.
Earth's Mantle
The thick layer of rock between the Earth's crust and core, making up about 84% of Earth's volume.
Atomic Weight
The average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element.
Neutrons
Subatomic particles found in the nucleus of an atom, with no electric charge and a mass slightly greater than that of protons.
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