As a Summer Intern at the National Institute of Standards $\degree$

question 30

Multiple Choice

As a summer intern at the National Institute of Standards and Technology, a student performed three measurements to determine the density of water at 25 $\degree$ C to four significant figures. She obtained the following results. The known density of water at 25 $\degree$ C to three significant figures is 0.958 g/mL. $$\begin{array} { c c } \text { Trial } & \text { Density } ( \mathbf { g } / \mathbf { m L } ) \\1 & 0.9345 \\2 & 0.9346 \\3 & 0.9348\end{array}$$ The measurements were __________

• A) sufficiently precise but not accurate.
• B) sufficiently accurate but not precise.
• C) both sufficiently precise and accurate.
• D) neither sufficiently precise nor accurate.
• E) not repeated an adequate number of times.

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Definitions:

Vertical Line Test

A method used in determining if a graph represents a function, stating that if a vertical line intersects the graph more than once, then the graph is not a function.

Function

An interaction between a collection of inputs and a series of allowed outputs, where each input has a unique output association.

Horizontal Shift

A movement of a graph in the left or right direction along the horizontal axis.