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Demographic Data Analyzer

In this challenge you must anaylize demographic data using Pandas. You are given a dataset of demographic data. Here is a sample of what the data looks like:

   age         workclass  fnlwgt  education  education-num      marital-status  ...     sex capital-gain capital-loss hours-per-week  native-country  salary
0   39         State-gov   77516  Bachelors             13       Never-married  ...    Male         2174            0             40   United-States   <=50K
1   50  Self-emp-not-inc   83311  Bachelors             13  Married-civ-spouse  ...    Male            0            0             13   United-States   <=50K
2   38           Private  215646    HS-grad              9            Divorced  ...    Male            0            0             40   United-States   <=50K

Certification Project: Mean-Variance-Standard Deviation Calculator

Create a function named mean_var_std() that uses Numpy to output the mean, variance, and standard deviation of a 3 x 3 matrix. The input of the function should be a list containing 9 digits. The function should convert the list into a 3 x 3 Numpy array, and then print the mean, variance, and standard deviation along both axis and for the flattened matrix.

For example: mean_var_std([0,1,2,3,4,5,6,7,8])

import sqlite3
class ContactDatabase(object):
def __init__(self, filename="example-contactbook.db"):
self.dbfilename = filename
db = sqlite3.connect(self.dbfilename)
c = db.cursor()
c.execute(
"CREATE TABLE IF NOT EXISTS contacts\
( name TEXT PRIMARY KEY, \
import random
class Card:
def __init__(self, suit, rank):
self.suit = suit
self.rank = rank
def __str__(self):
return f"{self.rank['rank']} of {self.suit}"
1. [HTML+CSS] Responsive Web Design
⭐️ PRACTICE PROJECTS ⭐️
- Learn Basic HTML by Building a Cat Photo App
- Learn Basic CSS by Building a Blog
- Learn Intermediate CSS by Building a Picasso Painting
- Learn the CSS Box Model by Building a Rothko Painting
- Learn CSS Variables by Building a City Skyline
- Learn CSS Animations by Building a Ferris Wheel
- Learn Typography by Building a Nutrition Label
- Learn Accessibility by Building a User Feedback Survey
1. [HTML+CSS] Responsive Web Design
⭐️ PRACTICE PROJECTS ⭐️
- Learn Basic HTML by Building a Cat Photo App
- Learn Basic CSS by Building a Blog
- Learn Intermediate CSS by Building a Picasso Painting
- Learn the CSS Box Model by Building a Rothko Painting
- Learn CSS Variables by Building a City Skyline
- Learn CSS Animations by Building a Ferris Wheel
- Learn Typography by Building a Nutrition Label
- Learn Accessibility by Building a User Feedback Survey
import random
class Card:
def __init__(self, suit, rank):
self.suit = suit
self.rank = rank
def __str__(self):
return f"{self.rank['rank']} of {self.suit}"
8. [Python] Object Oriented Programming in Python
• Learn Python Basics by Building a Blackjack Game
• Learn Intermediate Python by Building a Contact Book Program
• Learn Object Oriented Programming by Building a Minesweeper Game
• Learn Recursion by Solving the Tower of Hanoi Puzzle
• Required Project: Pig Latin Translator
• Required Project: Time Calculator
• Required Project: Stack Calculator
• Required Project: Budgeting App (using Object Oriented Programming)
• Required Project: Area Calculator for Rectangles and Squares (using Object Oriented Programming)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>freeCodeCamp.org</title>
const express = require('express');
const app = express();
const port = 3000;
let list = [];
app.get('/', (req, res) => {
res.json(list);
});