The Average Score of 100 Students Taking a Statistics Final

question 32

Multiple Choice

The average score of 100 students taking a statistics final was 70 with a standard deviation of 7. Assuming a normal distribution, approximately how many scored less than 60?

• A) 0.2271
• B) 0.3729
• C) 0.8929
• D) D)-1.14
• E) None of the choices are correct

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Definitions:

Materials Price Variance

The difference between a direct material’s actual price per unit and its standard price per unit, multiplied by the quantity purchased.

Standard Cost

An estimated or predetermined cost of performing an operation, producing a good, or delivering a service, used for budgeting and performance evaluation.

Variable Overhead Efficiency Variance

The difference between the actual variable overhead based on the efficient use of resources and the standard variable overhead expected.

Materials Price Variance

The difference between the actual cost of materials used and the standard cost, multiplied by the actual quantity of materials used.