Lab functions complete - Maya

[Maya-Souza]

No description provided.

[samuelTAIronhack]

Good work, for question 9 I have posted a possible solution below.
For question 11 remember the explenation that was given this morning by your classmate. Check slack for a reminder 9he posted it in a thread in the general chat.

from statistics import stdev
def st_dev(arr):
    
    total_elements = 0
    total_sum_elements = 0
    
    for num in arr:
        total_elements +=1
        total_sum_elements += num
    
    mean = total_sum_elements/total_elements
    
    deviation = 0
    
    for num in arr:
        deviation += (num-mean)**2
    
    standard_deviation = (deviation/(total_elements-1))**0.5
    
    return standard_deviation