An Analysis of the Grades on the First Test in History

question 30

Multiple Choice

An analysis of the grades on the first test in History 101 revealed that they approximate a normal curve with a mean of 75 and a standard deviation of 8. The instructor wants to award the grade of A to the upper 10 percent of the test grades. What is the dividing point between an A and a B grade?

• A) 80
• B) 85
• C) 90
• D) 95
• E) None of the choices are correct

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Definitions:

Skewed

A term describing data that is not symmetrically distributed, often leaning towards one side, either to the left or right, indicating a deviation from the normal distribution.

Travel Time

The duration taken to move from one location to another, often considered in the contexts of transportation planning, traffic management, and personal planning.

Histogram

A graphical representation of the distribution of numerical data, where the data is divided into bins, and the frequency of data in each bin is depicted by the height of the bar.

Mean

The average of a set of numbers, calculated by adding them all up and dividing by the count of those numbers.