A Large National Company Is Considering Negotiating Cellular Phone Rates

question 49

Multiple Choice

A large national company is considering negotiating cellular phone rates for its employees.The Human Resource department would like to estimate the proportion of its employee population who own an Apple iPhone.A random sample of size 250 is taken and 40% of the sample own and iPhone.The 90% confidence interval to estimate the population proportion is ____.

• A)0.35 to 0.45
• B)0.34 to 0.46
• C)0.38 to 0.42
• D)0.39 to 0.41
• E)0.40 to 0.45

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Definitions:

Charged Atom

A charged atom, also known as an ion, is an atom that has gained or lost one or more electrons, resulting in a positive or negative charge.

Solution

Uniform mixture of solute completely dissolved in solvent.

Table Salt

Common salt used in cooking and food preservation, chemically known as sodium chloride (NaCl).