Find the mean, variance, and standard deviation. If necessary, round your answer to the nearest hundredth.

{1, 2, 2, 4, 5, 6, 8}

Mean:

Variance:

Standard deviation:

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.