8. When is an individual breathing rate normal? It is said that the normal breathing rate for humans is 4 breaths per minute to as high as 75 for people who are engaged in some strenuous exercise. 30 patients were tested and the ff. were the results: 9.6 7.8 6.9 9.3 12.1 14.3 11.7 14.5 10.9 15.2 11.0 18.9 17.5 13.8 16.1 17.6 15.3 11.7 12.5 7.1 5.7 4.9 11.3 .8.6 5.8 5.7 13.0 14.9 8.9 9.5 Compute for a. Range b. Variance c. Standard deviation d. Coefficient of variation 9. What can you say about the normal rates of the 30 patients ? 10. Solve exercise number 2 using Excel. EXERCISE # 2. The length of time between the onset of a certain disease and its recurrence was recorded for 20 patients: (in weeks) 12.1 14.4 8.2 3.7 19.4 10.5 22.7 30.8 18.2 3.9 25.7 6.4 11.8 23.6 12.8 27.0 17.6 5.2 8.8 25.3 a. Range b. Variance c. Standard deviation d. Coefficient of variation