Free Attendance vs Grade Correlation Analyzer
Enter student attendance percentages and grades, compute the Pearson correlation coefficient, visualize the relationship on a live scatter plot, and export a full analysis PDF — no login required.
Runs entirely in your browser · No login · No data uploaded
then click Run Correlation Analysis.
How to Analyse Attendance vs Grades in 3 Steps
Follow these steps to get results in under a minute
How Correlation Analyzer Compares
vs spreadsheets, manual processes, and paid platforms
| Feature | UniCloud360 Correlation Analyzer | Manual Analysis | Excel / Sheets | SPSS / Stat Software |
|---|---|---|---|---|
| Pearson r Calculation | Auto — instant | Manual formula | Requires setup | Available but complex |
| Scatter Plot Visualisation | Live canvas chart | Not available | Manual chart creation | Available but steep learning curve |
| Student Zone Classification | Colour-coded zones | Not available | Manual conditional format | Not available |
| PDF Report Export | One-click export | Not available | Manual formatting | Export with formatting effort |
| No Login Required | Fully browser-based | Local file only | Account or licence needed | Always requires licence |
| Instant Recommendations | Auto-generated | Not available | Not available | Interpretation manual |
What Educators Are Saying
Trusted by lecturers and students across Sri Lankan universities
"I ran the analysis on my entire Grade 10 cohort in minutes. The scatter plot makes it immediately clear which students are high performers and which ones are at risk. The PDF export is professional and board-ready."
"Finally a tool that does what SPSS does but without the complexity. The Pearson r score and the recommendation text are exactly what I need to present to my school committee every term."
"The colour-coded student zones are brilliant. I can immediately identify who is present but underperforming versus who is absent but somehow still scoring well. Very insightful for targeted interventions."
"We integrated this into our end-of-term review process. The scatter plot PNG export is great for slide decks, and the correlation strength badge saves a lot of time in our reporting workflow."
More Free Student Attendance Tools
Statistical Foundations
Pearson Correlation Coefficient
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√[Σ(xi−x̄)² × Σ(yi−ȳ)²]
Measures the linear relationship between two variables (attendance and grade). Always ranges from −1 to +1. Values near ±1 indicate strong correlation; values near 0 indicate no linear relationship.
Correlation Strength Guide
0.4 ≤ |r| < 0.7 → Moderate
0.1 ≤ |r| < 0.4 → Weak
|r| < 0.1 → No correlation
Direction matters too: positive r means attendance and grades rise together; negative r means higher attendance is associated with lower grades — often indicating data issues.
R² — Coefficient of Determination
e.g. r = 0.85 → R² = 0.72
→ 72% of grade variance
explained by attendance
R² tells you what proportion of grade variation is explained by attendance. An R² of 0.72 means 72% of grade differences across students can be attributed to their attendance patterns.