作者: Russell Waugh

This new book investigates the relevant literature, mastering Rasch measurement and the Rasch Unidimensional Measurement Models (RUMM) computer program with its relevant statistics and their applicat …

Radon is a naturally occurring volatile gas formed from the alpha radioactive decay of radium. It is colorless, odorless, tasteless, chemically inert, and radioactive. Of all the radioisotopes that c …