According to an Industry Report, 26 Percent of All Households

question 105

Multiple Choice

According to an industry report, 26 percent of all households have at least one cell phone. Further, of those that do have a cell phone, the mean monthly bill is $55.90 with a standard deviation equal to $9.60. Recently, a random sample of 400 households was selected. Of these households, 88 indicated that they had cell phones. The mean bill for these 88 households was $57.00. What is the probability of getting 88 or fewer households with cell phones if the numbers provided by the industry report are correct?

• A) Approximately 0.0344
• B) Nearly 0.4656
• C) About 0.1345
• D) Can't be determined without knowing the standard deviation

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Definitions:

Mutations

Changes in the DNA sequence of a cell's genome, which can lead to variations in the traits of an organism, and are a primary source of genetic diversity.

Threshold Dose-Response

A concept in toxicology that indicates the lowest dose at which a particular response or effect is observed in an organism or system.

Ionizing Radiation

A type of energy released by atoms in the form of electromagnetic waves or particles that is capable of removing electrons from atoms or molecules, potentially causing damage to living tissue.

Chronic Toxicity

The adverse health effects resulting from long-term exposure to a toxic substance or agent.