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Donate Any Amount via PayPalA professional-grade toolkit built specifically for data analysts — included with every contribution tier.
Mean, median, standard deviation, z-scores, confidence intervals, and more — all in one place.
MoM/YoY growth, percentage change, CAGR, and trend calculations data analysts run every day.
Null rate, duplicate rate, uniqueness checks — the numbers you need before every analysis.
Sample size calculator, p-value calculator, and statistical significance analysis built in.
CAC, LTV, churn rate, retention rate, conversion rate — the metrics every analyst must know.
Estimate row counts, join sizes, and performance implications before you run that big query.
Every dollar directly improves the learning experience for thousands of data analysts.
Reliable, fast hosting for thousands of learners — server costs grow with the community.
Expanding from 90 to 200+ lessons across all six languages with dedicated time to write them right.
A native mobile experience so analysts can learn SQL and Python on the go, not just at their desk.
Discussion boards, peer challenges, and leaderboards to make learning more engaging and social.