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 12-13,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)5.8
C)6.2

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 12-13,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)5.8 
C)6.2

Quizplus · Accepted Answer

If there is no connection between weights and TV watching hours, the expected number of children in each category can be calculated using the marginal totals and the total number of observations. The expected value is calculated based on the proportion of children in each category, leading to an expected value of 5.8.

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