Assignment #1 (demo). Exploratory data analysis with Pandas#

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mlcourse.ai – Open Machine Learning Course

Author: Yury Kashnitsky. Translated and edited by Sergey Isaev, Artem Trunov, Anastasia Manokhina, and Yuanyuan Pao. All content is distributed under the Creative Commons CC BY-NC-SA 4.0 license.

Same assignment as a Kaggle Kernel + solution.

In this task you should use Pandas to answer a few questions about the Adult dataset. (You don’t have to download the data – it’s already in the repository). Choose the answers in the web-form.

Unique values of features (for more information please see the link above):

  • age: continuous;

  • workclass: Private, Self-emp-not-inc, Self-emp-inc, Federal-gov, Local-gov, State-gov, Without-pay, Never-worked;

  • fnlwgt: continuous;

  • education: Bachelors, Some-college, 11th, HS-grad, Prof-school, Assoc-acdm, Assoc-voc, 9th, 7th-8th, 12th, Masters, 1st-4th, 10th, Doctorate, 5th-6th, Preschool;

  • education-num: continuous;

  • marital-status: Married-civ-spouse, Divorced, Never-married, Separated, Widowed, Married-spouse-absent, Married-AF-spouse,

  • occupation: Tech-support, Craft-repair, Other-service, Sales, Exec-managerial, Prof-specialty, Handlers-cleaners, Machine-op-inspct, Adm-clerical, Farming-fishing, Transport-moving, Priv-house-serv, Protective-serv, Armed-Forces;

  • relationship: Wife, Own-child, Husband, Not-in-family, Other-relative, Unmarried;

  • race: White, Asian-Pac-Islander, Amer-Indian-Eskimo, Other, Black;

  • sex: Female, Male;

  • capital-gain: continuous.

  • capital-loss: continuous.

  • hours-per-week: continuous.

  • native-country: United-States, Cambodia, England, Puerto-Rico, Canada, Germany, Outlying-US(Guam-USVI-etc), India, Japan, Greece, South, China, Cuba, Iran, Honduras, Philippines, Italy, Poland, Jamaica, Vietnam, Mexico, Portugal, Ireland, France, Dominican-Republic, Laos, Ecuador, Taiwan, Haiti, Columbia, Hungary, Guatemala, Nicaragua, Scotland, Thailand, Yugoslavia, El-Salvador, Trinadad&Tobago, Peru, Hong, Holand-Netherlands;

  • salary: >50K, <=50K.

import numpy as np
import pandas as pd

pd.set_option("display.max.columns", 100)
# to draw pictures in jupyter notebook
%matplotlib inline
# we don't like warnings
# you can comment the following 2 lines if you'd like to
import warnings

import matplotlib.pyplot as plt
import seaborn as sns

warnings.filterwarnings("ignore")

# for Jupyter-book, we copy data from GitHub, locally, to save Internet traffic,
# you can specify the data/ folder from the root of your cloned
# https://github.com/Yorko/mlcourse.ai repo, to save Internet traffic
DATA_URL = "https://raw.githubusercontent.com/Yorko/mlcourse.ai/main/data/"

data = pd.read_csv(DATA_URL + "adult.data.csv")
data.head()
age workclass fnlwgt education education-num marital-status occupation relationship race sex capital-gain capital-loss hours-per-week native-country salary
0 39 State-gov 77516 Bachelors 13 Never-married Adm-clerical Not-in-family White Male 2174 0 40 United-States <=50K
1 50 Self-emp-not-inc 83311 Bachelors 13 Married-civ-spouse Exec-managerial Husband White Male 0 0 13 United-States <=50K
2 38 Private 215646 HS-grad 9 Divorced Handlers-cleaners Not-in-family White Male 0 0 40 United-States <=50K
3 53 Private 234721 11th 7 Married-civ-spouse Handlers-cleaners Husband Black Male 0 0 40 United-States <=50K
4 28 Private 338409 Bachelors 13 Married-civ-spouse Prof-specialty Wife Black Female 0 0 40 Cuba <=50K

1. How many men and women (sex feature) are represented in this dataset?

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

2. What is the average age (age feature) of women?

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

3. What is the percentage of German citizens (native-country feature)?

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

4-5. What are the mean and standard deviation of age for those who earn more than 50K per year (salary feature) and those who earn less than 50K per year?

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

6. Is it true that people who earn more than 50K have at least high school education? (education – Bachelors, Prof-school, Assoc-acdm, Assoc-voc, Masters or Doctorate feature)

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

7. Display age statistics for each race (race feature) and each gender (sex feature). Use groupby() and describe(). Find the maximum age of men of Amer-Indian-Eskimo race.

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

8. Among whom is the proportion of those who earn a lot (>50K) greater: married or single men (marital-status feature)? Consider as married those who have a marital-status starting with Married (Married-civ-spouse, Married-spouse-absent or Married-AF-spouse), the rest are considered bachelors.

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

9. What is the maximum number of hours a person works per week (hours-per-week feature)? How many people work such a number of hours, and what is the percentage of those who earn a lot (>50K) among them?

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)

10. Count the average time of work (hours-per-week) for those who earn a little and a lot (salary) for each country (native-country). What will these be for Japan?

# You code here (read-only in a JupyterBook, pls run jupyter-notebook to edit)