APPLIED BIOSTATISTICS IN HEALTH SCIENCES
LAB
Hypothetical study:
Exhaled nitric oxide (eNO) is increasingly gaining acceptance as a pulmonary function test reflective of
airway inflammation. A sample of 15 children were subjected to exhaled nitric oxide testing, by exhaling
into an analyzer using a steady, controlled exhaled flow rate of approximately 50 mL/sec. The test is
repeated until three reproducible results are obtained and the mean value is reported below. Normal
levels of eNO concentrations range between 5 and 15 ppb (vol).
Data:
13, 11, 10, 13, 6, 19, 13, 9, 12, 16, 14, 18, 21, 5, 23
Questions:
1. What type of data is exhaled nitric oxide (vol)? Please justify your answer.
Continues - intervial depends on the unit
2. What is the mean exhaled nitric oxide in your sample? 13.5
3. What is the mode? 13
4. What is the median? 13
