An industrial psychologist is interested in studying the effect of room temperat
ID: 3048870 • Letter: A
Question
An industrial psychologist is interested in studying the effect of room temperature and humidity on the performance of tasks requiring manual dexterity. She chooses three temperatures of 65 degrees Fahrenheit, 80 degrees Fahrenheit and 95 degrees Fahrenheit with humidity of 60% and 80%. The response variable measured is the number of correct insertions, during a 15-minute period using a peg-and-hole apparatus requiring the use of both hands simultaneously. After each subject is trained on the apparatus, he or she is asked to make as many insertions as possible in a 15-minute period. Sixty factory workers used to doing repetitive tasks are randomly assigned to the different temperature and humidity combinations.
1. The experimental units in this experiment are:
A) the number of correct insertions
B) the 15-minute interval
C) the factory workers
D) the peg-and-hole apparatus
2. The factors are:
A) the number of correct insertions
B) temperature and humidity
C) the training period
D) the two hands used to complete the task
3. The number of treatments is:
A) 2
B) 3
C) 6
D) 15
Explanation / Answer
Solution
1)D) the peg-and-hole apparatus
2) B) temperature and humidity
3) The number of treatments is: (c) 6