Round to the Nearest Tenth Unless Indicated Otherwise

question 40

Multiple Choice

Round to the nearest tenth unless indicated otherwise.
-At a fixed temperature, the resistance R of a wire varies directly as the length l and inversely as the square of its diameter d. If the resistance is 0.46 ohm when the diameter is 1 mm and the length is 230 cm, what is the
Resistance when the diameter is 2 mm and the length is 2170 cm?

• A) 1.1 ohm
• B) 542.5 ohm
• C) 249.6 ohm
• D) 2.2 ohm

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Definitions:

Continuous

Refers to a type of variable or data that can take an infinite number of values within a given range.

Pearson's Correlation Coefficient

A measure of the strength and direction of a linear relationship between two continuous variables, computed as the covariance of the variables divided by the product of their standard deviations.

Ordinal

A term referring to a type of data or a scale of measurement where items are ranked in order but the differences between rank positions are not necessarily equidistant.

Partial Correlation

A measure of the degree of association between two variables while holding one or more other variables constant.