A Study Was Designed to Investigate the Effects of Two

question 133

Multiple Choice

A study was designed to investigate the effects of two variables - (1) a studentʹs level of mathematical anxietyand (2) teaching method - on a studentʹs achievement in a mathematics course. Students who had a low levelof mathematical anxiety were taught using the traditional expository method. These students obtained a meanscore of 480 with a standard deviation of 20 on a standardized test. Assuming no information concerning theshape of the distribution is known, what percentage of the students scored between 440 and 520?

• A) at least 75%
• B) approximately 95%
• C) at least 88.9%
• D) approximately 68%

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Definitions:

Overhead Efficiency Variance

The difference between flexible budgets using actual volume and standard volume. It is an estimate of the additional overhead incurred.

Direct Labor Hours

The total amount of time workers spend directly manufacturing a product or providing a service.