Data, Statistics & Probability — TEAS & HESI Cheat Sheet
Center, spread & chance
👤 By the CinnaEntry Content Team
🕐 Updated 2026-09-06
🏷️ TEAS Mathematics
🔖 Free to read, print, and share
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Use this one-page guide to lock in Data, Statistics & Probability for the ATI TEAS 7 and HESI A2. Keep it handy during review and on exam day.
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📒 The 1-minute cheat sheet
📌 Measures Of Center
- Mean = add all ÷ how many (the average)
- Median = the MIDDLE value when ordered
- Mode = the value that appears MOST
- Range = highest − lowest
📌 Reading Graphs
- Bar graph = compare categories
- Line graph = change over time
- Pie chart = parts of a whole (adds to 100%)
- Always read the title, axes, and legend first
📌 Probability
- P = favorable outcomes ÷ total outcomes
- 0 = impossible, 1 = certain
- Rolling a 4 on a die = 1/6
✨Quick Tip
Focus on the highlighted terms — those are what the TEAS and HESI test most on data, statistics & probability.
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