Progress 8 CI Upper
DfE Performance Tables
Upper bound of 95% confidence interval for Progress 8 score
Understanding Progress 8 Confidence Interval (Upper Bound)
This is the upper bound of the 95% confidence interval for a school’s Progress 8 score. Combined with the lower bound, it shows the range of likely true performance.
Technical Explanation
The upper confidence bound represents the higher end of likely true performance. Together with the lower bound, it creates a range:
- Narrow interval (e.g., -0.1 to +0.3): High certainty, typically larger schools
- Wide interval (e.g., -0.5 to +0.7): More uncertainty, typically smaller schools
Statistical Significance
A Progress 8 score is considered statistically significant when the confidence interval doesn’t cross zero: - Both bounds positive = significantly above average - Both bounds negative = significantly below average - Interval crosses zero = not significantly different from average
Practical Use
For most purposes, the main Progress 8 score is sufficient. Confidence intervals are most useful when: - Comparing schools of different sizes - Making high-stakes decisions - Conducting statistical analysis
Small schools’ scores should be interpreted with more caution due to wider intervals.
Technical Details
- Column Name
- progress8_ci_upp
- Data Source
- DfE Performance Tables
Coverage by School Phase
How many schools have data available for this field.
This field does not contribute to the performance score calculation.
Distribution by School Phase
Statistical distribution of values across schools.
Related Fields
Fields that correlate with Progress 8 CI Upper. Click to explore.