If a Normally Distributed Group of Test Scores Have a Mean

question 52

Multiple Choice

If a normally distributed group of test scores have a mean of 70 and a standard deviation of 12, find the percentage of scores that will fall below 50.

• A) 4.75%
• B) 45.25%
• C) 6.75%
• D) 35.54%

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Definitions:

Beta Particle Emission

A radioactive decay process where an unstable atomic nucleus emits a beta particle, which is a high-speed electron or positron, as part of the transformation to a stable state.

Alpha Particle Emission

A type of radioactive decay in which an atomic nucleus releases an alpha particle (2 protons and 2 neutrons) and transforms into an atom with a mass number 4 units less and atomic number 2 units less.

Beta Particle Emission

A radioactive decay process where a beta particle (electron or positron) is emitted from an atomic nucleus.

Alpha Particle Emission

A type of radioactive decay in which an unstable atomic nucleus emits an alpha particle (2 protons and 2 neutrons) to form a new nucleus, decreasing its atomic number by 2 and mass number by 4.