Untitled

from collections import Counter

# Grouped data
data = {'2-4': [2, 3, 4, 5], '5-7': [5, 6, 7], '8-10': [8, 9, 10]}

frequency = [len(item[1]) for item in data.items()]
range_ = [item[0].split('-') for item in data.items()]
lower_limit = [int(item[0]) for item in range_]
upper_limit = [int(item[1]) for item in range_]

mean = sum([(lower_limit[i] + upper_limit[i])/2 * f-requency[i] for i in range(len(frequency))]) / sum(frequency)

frequency = [item for sublist in data.values() for item in sublist]
if len(frequency) % 2 == 0:
    median1 = frequency[len(frequency)//2]
    median2 = frequency[len(frequency)//2 - 1]
    median = (median1 + median2)/2
else:
    median = frequency[len(frequency)//2]

val = Counter(frequency)
findMode = dict(val)
mode = [i for i, v in findMode.items() if v == max(list(val.values()))]

print("Mean: ", mean)
print("Median: ", median)
print("Mode: ", mode)