The SAT Is an Exam Used by Colleges and Universities

question 41

Essay

The SAT is an exam used by colleges and universities to evaluate undergraduate applicants. The test scores are
normally distributed. In a recent year, the mean test score was 1475 and the standard deviation was 308. The
test scores of four students selected at random are 1930, 1340, 2150, and 1450.
a)Find the z-scores that correspond to each value
b)Determine whether any of the values are unusual.

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Definitions:

Enantiomers

Molecules that are mirror images of each other and cannot be superimposed, similar to a pair of hands.

Diastereomers

Stereoisomers that are not mirror images of each other nor superimposable, having multiple chiral centers.

Diastereomer

Stereoisomers that are not mirror images of each other, differing in the orientation of substituents around one or more stereocenters.

Diastereomers

Stereoisomers that are not mirror images of each other, differing in the configuration at one or more (but not all) of the chiral centers in molecules.