BIOSTAT 231
Statistical Power and Sample Size Methods for Health Research
Course statistics
- Predicted GPA
- 3.91
- n = 63 · 4 terms · ± 0.063
- A range
- 95%
- of letter grades
- Taken P/NP
- 0%
- — of those passed
- D / F / W
- 0.0%
- incl. withdrawals
Sections in Fall 2026
Not offered in Fall 2026.
Enrollment history
Final enrollment per term, averaged across that term's sections. Four years deep, summer excluded. Per-section live curves are on each section page.
- 1422S
- 1223S
- 1425W
- 2425S
Peak 24
Most recent
24
in 25S
4 terms on record
Grade distribution
- A+ 13 · 20.3%
- A 39 · 60.9%
- A- 8 · 12.5%
- B+ 2 · 3.1%
- B 1 · 1.6%
- S 1 · 1.6%
Grey bars are non-letter outcomes — P/NP, S/U, incompletes. They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted | Raw | n | Terms | A range |
|---|---|---|---|---|---|
| CRESPI-CHUN, CATHERINE | 3.92 | 3.92 | 63 | 4 | 95% |
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department — so an instructor with a handful of students sits near the course mean rather than topping the list.
By term
- 22S 3.90 n=13
- 23S 3.87 n=12
- 25W 3.98 n=14
- 25S 3.93 n=24