TABLE 12-13 Recent Studies Have Found That American Children Are More Obese

question 183

Multiple Choice

TABLE 12-13
Recent studies have found that American children are more obese than in the past. The amount of time children spent watching television has received much of the blame. A survey of 100 ten-year-olds revealed the following with regards to weights and average number of hours a day spent watching television. We are interested in testing whether the mean number of hours spent watching TV and weights are independent at 1% level of significance.

-Referring to Table 12-13, suppose the value of the test statistic was 30.00 (which is not the correct value) and the critical value at 1% level of significance was 10.00 (which is not the correct value) , which of the following conclusions would be correct?

• A) We will not reject the null and conclude that mean number of hours spent watching TV and weights are independent.
• B) We will reject the null and conclude that mean number of hours spent watching TV and weights are independent.
• C) We will not reject the null and conclude that mean number of hours spent watching TV and weights are not independent.
• D) We will reject the null and conclude that mean number of hours spent watching TV and weights are not independent.

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Definitions:

CSMA/CD

The method used on Ethernet networks to avoid data collisions; short for carrier sense multiple access with collision detection. A node connected to the network uses carrier sense to verify that no other nodes are currently transmitting data signals.

P2P

Stands for Peer-to-Peer, a decentralized communications model in which each party has the same capabilities and either party can initiate a communication session.

MAC Address

A distinctive identifier allocated to network interfaces for communication on the physical network section.

Collision Signals

Signals generated when two or more devices attempt to transmit over a network at the same time, resulting in a collision.