An experiment was designed to measure how long subjects could track a moving target on a computer screen. The target moved erratically according to a predetermined program.
- The first 6 subjects (volunteers recruited by signs along the main campus walkway) were tested under a control condition with no distractions.
- The next 12 were tested under a flashing light distraction.
- The next 18 were tested under a loud noise distraction.
The experiment was carried out as designed. The data (times in seconds) were as follows (listed in the sequence from first to last subject):
Control: 56, 53, 54, 49, 40, 42
Light Distraction: 44, 42, 43, 40, 39, 35, 37, 38, 32, 50, 30, 32
Sound Distraction: 34, 40, 30, 31, 29, 27, 28, 26, 26, 27, 25, 24, 20, 22, 19, 17, 10, 31
Tasks:
a. Compute an ANOVA table.
b. Find the value of the F statistic.
c. What is the nominal p-value for the F statistic?