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

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, the degrees of freedom of the test statistic are

A) 1.
B) 2.
C) 4.
D) 9.