# Import statistics Library
import statistics
# Calculate the standard deviation from an entire population
print(statistics.pstdev([1, 3, 5, 7, 9, 11]))
print(statistics.pstdev([2, 2.5, 1.25, 3.1, 1.75, 2.8]))
print(statistics.pstdev([-11, 5.5, -3.4, 7.1]))
print(statistics.pstdev([1, 30, 50, 100]))