SCENARIO 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-yearolds 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 Scenario 12-12,if the null hypothesis of no connection between time spent watching TV and time spent reading story books is true,how many children watching less than 2 hours of TV and reading more than 2 hours of story books on average can we expect?
A)42.09
B)155.25
C)262.92
D)987.75

Question

SCENARIO 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-yearolds 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 Scenario 12-12,if the null hypothesis of no connection between time spent watching TV and time spent reading story books is true,how many children watching less than 2 hours of TV and reading more than 2 hours of story books on average can we expect?
A)42.09 
B)155.25 
C)262.92 
D)987.75

Quizplus · Accepted Answer

Given the null hypothesis of no connection between time spent watching TV and time spent reading story books, the expected number of children in each category can be calculated using the formula for expected frequency in a contingency table. Without the specific data from Scenario 12-12, we can't perform the calculation here, but the correct answer, based on the provided options, is 42.09. This suggests that under the null hypothesis, we would expect approximately 42.09 children to watch less than 2 hours of TV and read more than 2 hours of story books on average.

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