Dorothy Little Purchased a Mailing List of 2,000 Names and Addresses

question 65

Multiple Choice

Dorothy Little purchased a mailing list of 2,000 names and addresses for her mail order business, but after scanning the list she doubts the authenticity of the list.She randomly selects five names from the list for validation.If 40% of the names on the list are non-authentic, and x is the number on non-authentic names in her sample, the expected (average) value of x is ______________.

• A)2.50
• B)2.00
• C)1.50
• D)1.25
• E)1.35

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Definitions:

MS

Mass spectrometry, an analytical technique used to measure the mass-to-charge ratio of ions, useful in determining the composition of a sample or molecule.

Molecular Formula

An expression that indicates the number and type of atoms present in a single molecule of a substance.

IR

Infrared radiation, often used in spectroscopy to identify compounds based on molecular vibrations.

Broad

In a scientific context, often refers to a wide range or spectrum of categories, conditions, or effects.