In a Recent Study of 42 Eighth Graders, the Mean

question 15

Multiple Choice

In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the population standard deviation is 5.8 hours. Find the 98% confidence interval for the
Population mean.

• A)(17.5, 21.7)
• B)(14.1, 23.2)
• C)(18.3, 20.9)
• D)(19.1, 20.4)

---

Definitions:

Mobile Marketing

Marketing through wireless handheld devices.

Wireless Handheld Devices

Portable electronic gadgets without the need for physical wires, used for communication, computing, and accessing information.

Cellular Telephones

Mobile phones that operate over a network of radio cells, allowing them to be used across a wide area without physical connection to a network.

Communication Process

The method by which information is transferred from a sender to a receiver with the intention of informing or inducing action.