Take Test: Week Four Final Exam COH606 Epidemiology Question 6

1. A psychologist has developed a test for school children that is supposed to identify who will commit violent crimes during adolescence and young adulthood. In one school 10 percent of the 200 children tested show a positive result, indicating criminal potential. Half of these children do indeed go on to commit violent crimes, whereas only 5 percent of those who tested negative do so. These data are entered into the table below:

   	Violent	Not Violent	Total
   Test Positive	10		20
   Test Negative	9		180
   Total	19		200

   What is the observed agreement between the test and the result?

1 points

Question 7

1. What is the expected agreement between the test and the result in the previous question?

1 points

Question 8

1. Calculate the kappa statistic for the scenario in #6.