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B. PROCEDURE : 1. Determining Pace Factor. a) Select a straight and level course and on both ends establish markers at least 90 meters apart. Designate these end points as A and B. b) Walk over the course at a natural pace or gait starting with either heel' or toe over point A and count the number of paces to reach point B. c) For succeeding trials, walk from B to A, then A to B, until 5 trials are completed, and the number of paces recorded accordingly. d) Refer to the accompanying sample format for the recording of observed field data. TRIAL LINE TAPED DIST (m) NUMBER OF PACES MEAN NO. OF PACES PACE FACTOR (m/pace) 1 AB BA N 3 3 AB 4 BA 5 AB a) 2. Measuring Distance by Pacing. Define or establish the end points of another level course whose length is to be determined by pacing. Designate these end points as C and D. b) For the first trial, walk over the course from C to D at a natural pace and record the number of paces. Then, walk from D toc and again record the number of paces. LABORATORY EXERCISES 6L Repeat the above procedure until all five trials are comp- leted. d) After the field data is recorded, make an actual taping of the course CD to determine the teped distance. e) Refer to the accompanying sample format for the recording of observed field data. TRIAL LINE NO. OF PACES MEAN PACED TAPED DIST DIST RELATIVE PRECISION 2 own - CD DC CD 3 818181818 DC 5 CD C. COMPUTATIONS : 1. Computing Pace Factor (PF). a) Get the sum of the number of paces for the five trials performed on course AB then compute the mean number of paces. b) Divide the known or taped length of course AB by the mean number of paces for AB to determine the pace factor. 2. Computing Paced Distance (PD). a) Get the sum of the number of paces for the five trials performed on course CD and compute the mean number of paces. b) Multiply the mean number of paces for CD by the pace factor to obtain the paced distance. 3. Computing Relative Precision (RP). a) Determine the difference between the taped distance of CD and the paced distance of CD. b) Divide the difference by the taped distance of CD and reduce the numerator to unity to determine the relative precision