TABLE 12-12
Recent Studies Have Found That American Children Are

question 49

Multiple Choice

TABLE 12-12
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 average number of hours spent watching TV and weights are independent at 1% level of significance.
$$\begin{array} { l | c l l | r } &{ \text { TV Hours } } & \\\text { Weights } & 0 - 3 & 3 - 6 & 6 + & \text { Total } \\\hline \text { More than } 101 \mathrm { ls } \text {. overweight } & 1 & 9 & 20 & 30 \\\text { Within } 101 \mathrm { bs } \text {. of normal weight } & 20 & 15 & 15 & 50 \\\text { More than } 10 \mathrm { lbs } \text {. underweight } & 10 & 5 & 5 & 20 \\\hline \text { Total } & 31 & 29 & 40 & 100\end{array}$$
-Referring to Table 12-12, if there is no connection between weights and average number of hours spent watching TV, we should expect how many children to be spending 3-6 hours on average watching TV and are more than 10 lbs. underweight?

• A) 5
• B) 8
• C) 5.8
• D) 6.2

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Definitions:

Lines of Sight

In management or design, the clear visual or conceptual path for workflow, communication, or strategic alignment.

Triangulation

The use of multiple methods or data sources in research to improve the accuracy and validity of results by cross-verifying findings.

Ethnography

A qualitative research method focused on studying cultures, practices, and communities through observation and participation.

Sociometry

A quantitative method for measuring social relationships, used to identify the structure of groups and the position of individuals within them.