Instruction 15-14
Recent Studies Have Found That Australian Children Are

question 49

Multiple Choice

Instruction 15-14
Recent studies have found that Australian 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. You are interested in testing whether the average number of hours spent watching TV and weights are independent at 1% level of significance.
| TV Hours |
$$\begin{array} { | l | c | c | c | c | } \hline \text { Weights } & 0 - 3 & 3 - 6 & 6 + & \text { Total } \\\hline \text { More than 10 kg overweight } & 1 & 9 & 20 & 30 \\\hline \text { Within 10 kg of normal weight } & 20 & 15 & 15 & 50 \\\hline \text { More than 10 kg underweight } & 10 & 5 & 5 & 20 \\\hline \text { Total } & 31 & 29 & 40 & 100 \\\hline\end{array}$$
-Referring to Instruction 15-14,how many children in the survey spend no more than 6 hours watching TV and are more than 10 kg underweight?

• A) 15
• B) 20
• C) 10
• D) 5

Acknowledge the self-corrective nature of natural science and the significance of independent replication and evaluation.

Distinguish between various types of reasoning utilized in scientific inquiry.

Appreciate the complexity and diversity of the universe as explored through scientific inquiry.

Understand the impact of scientific research on the development of governmental policy.

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Definitions:

Operant Conditioning

The method of transforming behavior intensity by administering either reinforcements or punishments.

Shaping

A method of training by which successive approximations toward a desired behavior are reinforced.

Withholding Reinforcement

is a behavioral strategy where a positive outcome or reward is not given, aiming to decrease or eliminate a certain behavior.

Extinction

In behavior psychology, the gradual disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.