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 test is always a one-tail test.

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, the test is always a one-tail test.

Quizplus · Accepted Answer

Table 12-13 shows that the test is always a one-tail test because the critical value is always found in the upper or lower tail of the distribution.

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