I need help with a task

Hello everyone, I need help, maybe someone has already encountered this, https://www.codecademy.com/exams/journeys/data-scientist-aly/paths/dsalycj-22-statistics-for-data-scientists/parts/2 I can’t finish the exam, I just stuck in 2 places, and for a couple of days I’ve been standing still

The dataset loaded in the code editor is FiveThirtyEight’s Candy Power Rankings dataset. The column winpercent represents the overall win percentage according to 269,000 matchups.

Calculate the variance, standard deviation and interquartile range of this field, save them as var, std and iqr respectively and print them.
Here is my code

import numpy as np
import pandas as pd
from scipy.stats import iqr

Loading the dataset

df = pd.read_csv(‘candy-data.csv’)

Calculate the variance of the winpercent column

var = df.winpercent.var()

Calculate the standard deviation of the winpercent column

std = df.winpercent.std()

Calculate the interquartile range (IQR) of the winpercent column

iqr_value = iqr(df.winpercent)

Print the results

print(f"Variance: {var}“)
print(f"Standard Deviation: {std}”)
print(f"Interquartile Range: {iqr_value}")

but it tells
type function doesn’t define round method

I’m sorry but we can’t help with exams.

That said, look up the error message and go from there.