A Polling Agency Wants to Determine the Size of a Random

question 19

Multiple Choice

A polling agency wants to determine the size of a random sample needed to estimate the proportion of homeowners who have an electronic home security system. The estimate should have margin of error no more than 4 percentage points at a 95% level of confidence. Choose the most conservative answer that is closest to your calculated number, rounding to the nearest whole person.

• A)They should poll at least 1100 people.
• B)They should poll at least 600 people.
• C)They should poll at least 1000 people.
• D)They should poll at least 500 people.

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Definitions:

Strings of Digits

Sequences of numerical digits, which can be used in various contexts such as passwords, mathematical calculations, or data entry.

Left Hand

The non-dominant hand for the majority of people, controlled by the right hemisphere of the brain, often associated with tasks requiring spatial and nonverbal processes.

Percentage

A mathematical term expressing a number or ratio as a fraction of 100, used to compare proportions.

Aphasic

Pertaining to aphasia, a condition characterized by the loss of the ability to understand or express speech, caused by brain damage.