Programming 102: Max\Min\Mean functions

#Weather data from Cambridge UK (Source: https://www.ncdc.noaa.gov/)

# set up functions to take the relevant list
def minimum(the_list):
    value = sorted(the_list)[0]
    return value

def maximum(the_list):
    value = sorted(the_list, reverse=True)[0]
    return value

def mean(the_list):
    total = 0
    for x in range(len(the_list)):
        total += the_list[x]
    value = round(total/len(the_list), 2)
    return value

# list the 3 data sets
max_temps = [8,9,12,15,18,21,23,23,20,16,11,8]
min_temps = [2,2,3,5,8,11,13,13,10,8,4,2]
rain_days = [10,8,7,7,8,8,8,9,6,8,10,8]

# menu to choose which data set to work on
print("Which data would you like to work with? Select option 1, 2 or 3 below:\n")
the_choice = input("1: Maximum monthly temperatures\n2: Minimum monthly temperatures\n3: Number of rainy days\n\n> ")

if the_choice == "1":
    the_list = max_temps
elif the_choice == "2":
    the_list = min_temps
elif the_choice == "3":
    the_list = rain_days
else:
    print("Invalid selection")

# Establish which procedure is needed
print("For this data set, would you like to know the maximum value, minimum value or average value?")
the_choice = input("1: Maximum value\n2: Minimum value\n3: Average value\n\n> ")

if the_choice == "1":
    print("\nThe maximum value is: " + str(maximum(the_list)))
elif the_choice == "2":
    print("\nThe minimum value is: " + str(minimum(the_list)))
elif the_choice == "3":
    print("\nThe mean value is: " + str(mean(the_list)))
else:
    print("\nInvalid selection")
print()