📚 Data Science Riddle
Which algorithm groups data into clusters without labels?
Which algorithm groups data into clusters without labels?
Anonymous Quiz
13%
Decision Tree
13%
Linear Regression
65%
K-Means
9%
Naive Bayes
❤2
📚 Data Science Riddle
In PCA, what do eigenvectors represent?
In PCA, what do eigenvectors represent?
Anonymous Quiz
47%
Directions of maximum variance
31%
Amount of variance captured
10%
Data reconstruction error
11%
Orthogonality of inputs
👍4
📚 Data Science Riddle
What metric is commonly used to decide splits in decision trees?
What metric is commonly used to decide splits in decision trees?
Anonymous Quiz
56%
Entropy
18%
Accuracy
6%
Recall
20%
Variance
❤4
📚 Data Science Riddle
Which algorithm is most sensitive to feature scaling?
Which algorithm is most sensitive to feature scaling?
Anonymous Quiz
24%
Decision Tree
26%
Random Forest
35%
KNN
15%
Naive Bayes
📚 Data Science Riddle
Why does bagging reduce variance?
Why does bagging reduce variance?
Anonymous Quiz
14%
Uses deeper trees
51%
Averages multiple models
27%
Penalizes weights
8%
Learns Sequentially
📊 Infographic Elements That Every Data Person Should Master 🚀
After years of working with data, I can tell you one thing:
👉 The
Here’s your quick visual toolkit 👇
🔹 Timelines
* Sequential ⏩ great for processes
* Scaled ⏳ best for real dates/events
🔹 Circular Charts
* Donut 🍩 & Pie 🥧 for proportions
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* Bar 📊 & Histogram 📏 (clear, reliable)
* Line 📈 for trends
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🔹 Advanced Tricks
* Stacked Bar 🏗 when categories add up
* Span 📐 for ranges
* Arc 🌈 for relationships
💡 Pro tip from experience:
If your audience doesn’t “get it” in 3 seconds, change the chart. The best visualizations
After years of working with data, I can tell you one thing:
👉 The
chart ou choose is as important as the data itself.Here’s your quick visual toolkit 👇
🔹 Timelines
* Sequential ⏩ great for processes
* Scaled ⏳ best for real dates/events
🔹 Circular Charts
* Donut 🍩 & Pie 🥧 for proportions
* Radial 🌌 for progress or cycles
* Venn 🎯 when you want to show overlaps
🔹 Creative Comparisons
* Bubble 🫧 & Area 🔵 for impact by size
* Dot Matrix 🔴 for colorful distributions
* Pictogram 👥 when storytelling matters most
🔹 Classic Must-Haves
* Bar 📊 & Histogram 📏 (clear, reliable)
* Line 📈 for trends
* Area 🌊 & Stacked Area for the “big picture”
🔹 Advanced Tricks
* Stacked Bar 🏗 when categories add up
* Span 📐 for ranges
* Arc 🌈 for relationships
💡 Pro tip from experience:
If your audience doesn’t “get it” in 3 seconds, change the chart. The best visualizations
speak louder than numbers❤7🔥3
📚 Data Science Riddle
Which Metric is best for imbalanced classification?
Which Metric is best for imbalanced classification?
Anonymous Quiz
20%
Accuracy
18%
Precision
19%
Recall
43%
F1-Score