Question

use python3

Implement a function sd (x) that takes a list x of data points as input and returns the standard deviation. You can assume that X has at least two elements.

Answer 1

import math
def sd(X):
n = len(X)
mean = sum(X) / n
diff = [x - mean for x in X]
sq_diff = [d ** 2 for d in diff]
sq_diff_sum = sum(sq_diff)
variance = sq_diff_sum / (n - 1)
sd = math.sqrt(variance)
return sd;
  
X = [4,5,6,7,1,2,3,9,8,10]
print(sd(X));

import math def sd(X): nlen(X) mean sum(X) n diff = [x - mean sq_diff d2 for d in diff] sq_diff_sum sum (sq_diff) variance sq_diff_sum (n - 1) sd math.sqrt (variance) return sd; for x in x] X = [4, 5, 6, 7, 1,2,3,9,8,10] print (sd(x))

Output:

sh-4.3$ python3 main.py                                                                                                                                                                                                                                                

3.0276503540974917