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ADS1001 - Data challenges 1 - S1 2025

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Assume you're working with the following dataframe 'df':

Image failed to load: dfA

Which of the plots below corresponds to the snippet:

sns.barplot(data=df, x='Day', y='Value', hue='Category')

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What is the main difference between .loc[] and .iloc[]?

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What is the output of the following code snippet:

import pandas as pd

df = pd.DataFrame({'score': [40, 60, 90]})

print(df[df['score'] < 50])

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Consider the following dataframe of movie ratings called 'data':

Image failed to load: data

What is the correct output of the following:

data.describe().round(2)

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Assume dataframe called df was created. What will df['column_name'] return?

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Which method is used to read a CSV file into a Pandas DataFrame?

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What is Matplotlib primarily used for?

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What is a possible output of the following snippet:

import numpy as np

np.random.randn(4)
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How do you add label to the vertical axis of a plot?

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Which of the plots below corresponds to the following snippet:

import numpy as np

import matplotlib.pyplot as plt

xdata = np.linspace(0, 10, 11)

ydata = [5, 11, 10, 9, 11, 13, 14,  9, 13, 15, 10]

plt.plot(xdata, ydata, '*g')

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