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:

Developing Organism

An entity, typically in the early stages of physical and biological formation, particularly prior to birth.

Conception

The process of fertilization where a sperm cell merges with an ovum, leading to the formation of a zygote and the start of pregnancy.

Fetus

A developing mammal after the embryonic stage and before birth, particularly in humans from the ninth week of pregnancy until birth.

Developmental Group

A term that could refer to a group of individuals at a similar stage of development or a therapeutic group aimed at addressing developmental issues, but without a standard definition, clarification is needed.