# Desktop Python teaching example. Numerical inputs are illustrative.
from statistics import mean, stdev
rows = [(0.59, 3.0), (0.61, 3.1), (0.60, 2.9)]  # fictional
speeds = [distance / elapsed for distance, elapsed in rows]
print("mean_m_s", mean(speeds))
print("sample_sd_m_s", stdev(speeds))