Question

Write a class called Person that has two private data members - the person's name and age. It should have an init method that takes two values and uses them to initialize the data members. It should have a get_age method.

Write a separate function (not part of the Person class) called std_dev that takes as a parameter a list of Person objects and returns the standard deviation of all their ages (the population standard deviation that uses a denominator of N, not the sample standard deviation, which uses a different denominator).

To calculate the standard deviation, you'll need to take a square root, which you can do by just using an exponent of 0.5. For example, the result of 9 ** 0.5 would be 3.0. Python does have a specific sqrt() function, but that involves importing a module, which we haven't covered yet.

Here's a simple example of how your class and function could be used:

p1 = Person("Kyoungmin", 73)
p2 = Person("Mercedes", 24)
p3 = Person("Beatrice", 48)
person_list = [p1, p2, p3]
answer = std_dev(person_list)

Answer 1

Explanation

Here is the class Person and the function std_dev and the output is attached below

Code:

class Person:
  
def __init__(self, name, age):
self.__name = name
self.__age = age
  
def get_age(self):
return self.__age
  

def std_dev(obj_list):
  
res = []
  
for ob in obj_list:
res.append(ob.get_age())
  
avg = sum(res)/len(res)
  
var = 0
  
for each in res:
var = var + (each-avg)**2
  
var = var/len(res)
  
return var**0.5

p1 = Person("Kyoungmin", 73)
p2 = Person("Mercedes", 24)
p3 = Person("Beatrice", 48)
person_list = [p1, p2, p3]
answer = std_dev(person_list)

print(answer)

Output:

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