Question

Using the black numbers on the stop watch to answer the questions

what is the most accurate reading seconds as indicated by the long second hand?
1st answer: 5.3s
2nd answer: Tenths of seconds

Answer 1

r = 0.84

Explanation:

The mean reading time obtained with the stopwatch measurements was 4.34 ± 0.57 seconds (196.21 ± 21.79 wpm), versus 4.44 ± 0.59 seconds (192.24 ± 22.20 wpm) by computer measurement (r = 0.84).