Sc 7P lab HW check next class

I will be doing a HW check for all Science 7P students next class.  At that time you should have completed the averages for all categories of reflex-testing activities (sight, touch, sound, and sight/touch).  Remember:

sum of drops (in cm)

_______________     =  average reaction time (in cm)

          # of trials

For example, if my results were 10cm, 22cm, 12cm, 13cm, and 7cm, then:

10 + 22 + 12 + 13 + 7 = 64

64 / 5 (number of times I dropped the metre stick) = 12.8

Therefore, my average is 12.8cm.  (Please complete this process for each category.)