# Enter your code here. Read input from STDIN. Print output to STDOUT
import sys
import numpy as np
from scipy import stats

# Read Data
data = sys.stdin.read().splitlines()
nums = data[1].split(' ')
nums = np.array([int(num) for num in nums])

# Calculate Stats
mean = np.mean(nums)
median = np.median(nums)
mode = stats.mode(nums)[0]
std = np.std(nums)
z = 1.96
std_error = (std/(np.sqrt(len(nums))))
lower = mean - z*std_error
upper = mean + z*std_error

# Print Output
print(f"{mean:.1f}")
print(f"{median:.1f}")
print(mode)
print(f"{std:.1f}")
print(f"{lower:.1f} {upper:.1f}")