Homework SourseIn an effort to predict the time it would take to use the ap
In an effort to predict the time it would take to use the application to find a class to visit, the developers ran an additional experiment with the high school seniors in which they varied the probabilities associated with the appearance of class types on the map and recorded the choice reaction time under each condition. The results were as follows:
Class Type
Lecture
Student
Presentation
Interactive
Class
Not
available
RT(ave.)
Probability
0.25
0.25
0.25
0.25
360 msec.
0.48
0.30
0.12
0.10
340 msec.
An evaluation of the types of classes typically taught in the School of Engineering shows that the actual probability of each type of class is as show below. What is the expected reaction time in this case?
Class Type
Lecture
Student
Presentation
Interactive
Class
Not
available
RT(ave.)
Probability
0.67
0.09
0.04
0.20
????
| Class Type | Lecture | Student Presentation | Interactive Class | Not available | RT(ave.) | |
| Probability | 0.25 | 0.25 | 0.25 | 0.25 | 360 msec. | |
| 0.48 | 0.30 | 0.12 | 0.10 | 340 msec. | ||
Solution
What is the expected reaction time in this case?
360 + 340 / 2
350
