What is the standard deviation for this sample data?
Commuter travels many miles to work each morning. She has timed this trip 5 times during the last month. The time (in min) required to make this trip was 44, 39, 41, 35, and 41. The mean time required for this trip was 40 min.
To find the standard deviation for this ample data where 5 journeys differ from the mean, each deviation must be taken separately. The total must be added and then dvided by 5, i.e. the number of instances in question. This calculation results in 3. 32 and this is the standard deviation regarding the journey times.