On a Recent English Exam,scores Averaged 84 Points

question 65

Multiple Choice

On a recent English exam,scores averaged 84 points.If 41% of scores fell below 70 points,find an approximate standard deviation (assuming the Normal model is appropriate) .

• A)60.87
• B)-69.57
• C)-669.57
• D)34.44
• E)28.7

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Definitions:

Williamson Ether Synthesis

A method for preparing ethers by reacting an alkoxide ion with a primary alkyl halide or tosylate under basic conditions.

Propoxycyclohexane

An organic compound featuring a cyclohexane ring with a propoxy substituent attached to it.

Synthesis Shown

This term is unclear out of context but generally refers to the depiction or explanation of a chemical synthesis process.

Necessary Reagents

Specific substances or chemicals required to carry out a chemical reaction.