World 3 · Spread and Center · 13 min · PRO
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PRO · Data Detective
World 3: Spread and Center is part of PRO
The first world of Data Detective is free. PRO opens the other 25 lessons in 6 worlds — simulations, quizzes and all.
PRO includes
- All 60 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly