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, how many children in the survey spend more than 6 hours watching TV and are more than 10 lbs. overweight?
A) 1
B) 9
C) 20
D) 40

Question

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, how many children in the survey spend more than 6 hours watching TV and are more than 10 lbs. overweight?
A) 1 
B) 9 
C) 20 
D) 40

Quizplus · Accepted Answer

From Table 12-13, we see that there are 20 children who spend more than 6 hours watching TV and are more than 10 lbs. overweight (cell 3,3).

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