The Test Scores from a Recent Mathematics Test Are as Follows

question 110

Multiple Choice

The test scores from a recent Mathematics test are as follows: 95.5,65.9,93.2,88.6,56.8,50,86.4,54.5,40.9,77.3,79.5,65.9,70.5,77.3,81.8,50,79.5,and 68.2.The mean score was 71.2 with a standard deviation of 15.5.If the Normal model is appropriate,what percent of the scores will be less than 40.2?

• A)0.15%
• B)10%
• C)5%
• D)15.87%
• E)2.28%

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Definitions:

Atomic Orbitals

Mathematical functions that describe the wave-like behavior of an electron in an atom, these orbitals determine the distribution of electrons around an atom’s nucleus.

Hybrid Atomic Orbitals

Orbitals formed by the combination of standard atomic orbitals within an atom, explaining the bonding and geometry of molecules more accurately than unhybridized orbitals.

C-O Bond

A chemical bond between carbon and oxygen atoms, common in various organic and inorganic molecules and materials.

IUPAC Name

A structured technique for the naming of chemical compounds suggested by the International Union of Pure and Applied Chemistry.