Can someone help me with this question because I'm not sure of how to do it exactly:
There are two routes for a worker to get to his office. Both the routes involve hold ups due to traffic lights. He records these times over a series of six journeys for each route. The results are shown below:
Route 1 : 15 15 11 17 14 12
Route 2 : 11 14 17 15 16 11
Work out the standard deviation for each route.
I am confused as I don't know in the formula for standard deviation in a discrete frequency distribution which part would be x and which would be f.
Any help would be great.