A University Wants to Estimate the Average Distance That Commuter

question 10

Multiple Choice

A university wants to estimate the average distance that commuter students travel to get to class with an error of ± 3 miles and 90 percent confidence. What sample size would be needed, assuming that travel distances are normally distributed with a range of X = 0 to X = 50 miles, using the Empirical Rule μ ± 3σ to estimate σ.

• A)About 28 students
• B)About 47 students
• C)About 30 students
• D)About 21 students

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Definitions:

Line-Angle Formula

A shorthand representation of organic molecules where lines represent bonds and vertices represent carbon atoms, simplifying structural depiction.

Resonance Structure

Different Lewis structures representing the same molecule that differ only in the positions of the electrons, not the positions of the atoms.

Organic Molecule

A molecule of the kind typically found in living systems, often containing carbon atoms bonded to hydrogen, oxygen, or nitrogen.

Resonance Forms

Different Lewis structures for a molecule that depict the same arrangement of atoms but differ in the distribution of electrons.