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Title
Difficulty
Histogram of Tweets
Easy
Data Science Skills
Easy
Page With No Likes
Easy
Tesla
Unfinished Parts
Easy
New York Times
Laptop vs. Mobile Viewership
Easy
Average Post Hiatus (Part 1)
Easy
Microsoft
Teams Power Users
Easy
Duplicate Job Listings
Easy
Robinhood
Cities With Completed Trades
Easy
Amazon
Average Review Ratings
Easy
App Click-through Rate (CTR)
Easy
TikTok
Second Day Confirmation
Easy
JPMorgan Chase
Cards Issued Difference
Easy
Alibaba
Compressed Mean
Easy
CVS Health
Pharmacy Analytics (Part 1)
Easy
CVS Health
Pharmacy Analytics (Part 2)
Easy
CVS Health
Pharmacy Analytics (Part 3)
Easy
Uber
User's Third Transaction
Medium
Snapchat
Sending vs. Opening Snaps
Medium
Tweets' Rolling Averages
Medium
Amazon
Highest-Grossing Items
Medium
Spotify
Top 5 Artists
Medium
TikTok
Signup Activation Rate
Medium
Microsoft
Supercloud Customer
Medium
Odd and Even Measurements
Medium
Walmart
Histogram of Users and Purchases
Medium
Alibaba
Compressed Mode
Medium
JPMorgan Chase
Card Launch Success
Medium
Verizon
International Call Percentage
Medium
Active User Retention
Hard
Wayfair
Y-on-Y Growth Rate
Hard
Amazon
Maximize Prime Item Inventory
Hard
Median Google Search Frequency
Hard
Advertiser Status
Hard
McKinsey
3-Topping Pizzas
Hard
Stripe
Repeated Payments
Hard