... use ratios. For example, if you count 10 beats in 15 seconds, the calculations are as follows: X = beats counted 60 min time used (sec) ... For the class data record the difference between the first and second counts (2nd - 1st) in beats/min. 6.
|Title||:||Concepts Biology Lab Manual|
|Publisher||:||Kendall Hunt Publishing Company - 1995-05-01|