A Large National Company Is Considering Negotiating Cellular Phone Rates

question 78

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) 0.37 to 0.43
• D) 0.39 to 0.41
• E) 0.40 to 0.45

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Definitions:

Mandible

The lower jawbone, significant in the skeletal structure of the face, involved in chewing and forming the lower part of the skull.

Fractured

The condition of having a broken bone or a crack in a bone.

Rib

One of the long curved bones forming the rib cage, which protects the thoracic cavity and its organs.

Neck

Slightly constricted part of a tooth, between the crown and the root.