A Researcher Conducted a Study of the Access Speed of 45

question 37

Multiple Choice

A researcher conducted a study of the access speed of 45 hard drives and concluded that his maximum error of estimate was 20. If he were to conduct a second study to reduce the maximum error of estimate to 5, about how many hard drives should he include in his new sample?

• A) 45
• B) 90
• C) 180
• D) 720

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Definitions:

Interval

A range of numbers between two set points.

Real Number Line

A one-dimensional line on which every point corresponds to a real number and every real number to a point.

Real Number Line

A line that graphically represents all possible real numbers, where each point on the line corresponds to a unique real number.

Inequality

An inequality is a mathematical statement indicating that two expressions are not equal, represented by symbols such as > (greater than), < (less than), ≥ (greater than or equal to), or ≤ (less than or equal to).