Uncertainty

In plain English

Confidence intervals express a range of plausible values.

• Report intervals, not just points.
• Wider intervals mean more uncertainty.
• Do not confuse significance with importance.

from statistics import mean, stdev
import math
values = [12, 18, 9, 22]
se = stdev(values) / math.sqrt(len(values))
print(mean(values) - 2 * se, mean(values) + 2 * se)