The article “Oxygen Consumption During Fire Suppression: Error of Heart Rate Estimation (Ergonomics 1991: 1469– 1474) reported the following data on oxygen consumption (mL/kg/min) for a sample of ten firefighters performing a fire suppression simulation:

Compute the following:
a. The sample range
b. The sample variance s² from the definition (by first computing deviations, then squaring them, etc.) 

c. The sample standard deviation
d. s² using the shortcut method

Transcribed Image Text:

29.5 49.3 30.6 28.2 28.0 26.3 33.9 29.4 23.5 31.6