In 2007,13,000 Internet Users Were Surveyed and Asked About Their

question 164

Multiple Choice

In 2007,13,000 internet users were surveyed and asked about their willingness to pay fees for access to websites.Of these,2,938 were definitely not willing to pay such fees.How large a sample is necessary to estimate the proportion of interest to within 2% in a 95% confidence interval?

• A)18
• B)307
• C)1680
• D)2000
• E)2965

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Definitions:

Radiopaque

Describes substances that do not allow X-rays or similar radiation to pass through, appearing white or light on a radiograph.

Radiograph

An image produced on a sensitive plate or film by X-rays, gamma rays, or similar radiation, typically used in medical imaging.

Echography

A diagnostic technique using ultrasound waves to produce images of structures within the body; also known as ultrasound imaging.

Cineradiography

A motion picture recording of X-ray images showing the movement of a part of the body.