Reaction time (milliseconds) to three types of stimuli (auditory, tactile, and v
ID: 3340067 • Letter: R
Question
Reaction time (milliseconds) to three types of stimuli (auditory, tactile, and visual) was measured in a small study with 5 age groups and 3 subjects within each group. The age groups (blocks), stimulus types (treatments), and corresponding reaction times in () are:
20-29
Tactile (615)
Auditory (490)
Tactile (600)
30-39
Auditory (465)
Visual (375)
Auditory (520)
40-49
Tactile (685)
Tactile (605)
Visual (500)
50-59
Visual (520)
Tactile (760)
Auditory (605)
60-69
Auditory (690)
Visual (510)
Visual (545)
Find the values of the three stimulus type sample means and the Least Square estimated marginal means of the three stimulus types. .
20-29
Tactile (615)
Auditory (490)
Tactile (600)
30-39
Auditory (465)
Visual (375)
Auditory (520)
40-49
Tactile (685)
Tactile (605)
Visual (500)
50-59
Visual (520)
Tactile (760)
Auditory (605)
60-69
Auditory (690)
Visual (510)
Visual (545)
Explanation / Answer
We have the following data:
There the sample mean is the simple average:
For Least Square estimated marginal means, first calculate mean for individual cell and then take average of the column:
Auditory Tactile Visual 20-29 490 615, 600 . 30-39 465, 520 . 375 40-49 . 685, 605 500 50-59 605 760 520 60-69 690 545 510Related Questions
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