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

question 33

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,which of the following statements is correct?

• A) You can reject the null for any level of significance smaller than 0.005.
• B) You can reject the null for any level of significance greater than 0.005.
• C) You can accept the null for any level of significance smaller than 0.005.
• D) You can accept the null for any level of significance greater than 0.005.

Calculate degrees of freedom for various sample sizes.

Differentiate between confidence intervals for means and standard deviations.

Understand the formula and application for finding confidence intervals for various population parameters.

Differentiate between prediction intervals and confidence intervals and understand their applications.

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Definitions:

Self-Management

The ability of an individual to manage their personal activities and behaviors in an effective manner without external control.

Emotional Intelligence

The ability to recognize, understand, manage, and reason with one's own emotions and the emotions of others.

Leadership

The act of guiding and directing a group towards achieving a common goal, through influence and motivation.

Role

A set of expectations or duties assigned to an individual in a social situation or in an organizational setting.