Program that generates 20 random numbers (mean, standard deviation)

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hello, this program is related to the mean and standard deviation, the mean I got, but when trying to do it for the standard deviation I was not successful, I tried in different ways, I couldn't use the same numbers of the mean, because when calling the def function draw() generated new numbers.

What I have tried:

Python

from random import *

soma = 0.0
 


def sorteio():
    a = randint(0,5)
    return a

for i in range(0, 6):
    
    soma += sorteio()

media = soma / 5    
print('media = ',media)

Posted 19-Jul-22 16:59pm

Rodrigo 2022

Updated 19-Jul-22 20:20pm

Patrice T

v2

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Patrice T 19-Jul-22 23:40pm

Show your attempt to standard deviation.
Here we help you to fix your code.

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OriginalGriff · Answer 1 · 2022-07-19T18:27:00

Solution 1

If you need to use the same numbers - and you do - then generate the randoms numbers and store them in an array: Python Arrays[^]
You them modify both the mean and standard deviation code to use the data from the array instead of fetching a new random number each time.

Posted 19-Jul-22 18:27pm

OriginalGriff

Comments

Maciej Los 20-Jul-22 1:23am

Short And To The Point!

CPallini 20-Jul-22 2:20am

5.

CPallini · Answer 2 · 2022-07-19T20:20:00

Note: your computation of the average is NOT correct:

Python

for i in range(0, 6):
    soma += sorteio()

extracts (and sums up) 6 values, while

Python

media = soma / 5

divides by 5.

Anyway, as already suggested by Griff, consider rearranging your code for keeping track of the extracted values, e.g.

Python

from random import *
  
def sorteio():
    a = randint(0,5)
    return a

def average(l):
    sum = 0.0
    for x in l:
        sum = sum + x
    return sum/len(l)

l = [] # the list will contain the random extracted numbers
for i in range(0, 5):
    l.append(sorteio())

print(l) # show the list
print("average ", average(l))

Then, standard deviation implementation should be straightforward.

Program that generates 20 random numbers (mean, standard deviation)

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