In [9]:
sample = input("Introduce una muestra de números separados por comas: ")
sample = sample.split(',')
n = len(sample)
for i in range(n):
sample[i] = int(sample[i])
sample = tuple(sample)
sum = 0
sumsq = 0
for i in sample:
sum += i
sumsq += i**2
mean = sum/n
stdev = (sumsq/n-mean**2)**(1/2)
print('La media es', mean, ', y la desviación típica es', stdev)