BA/BS · 2025-2026
Statistics and Data Science
Department of Statistics & Applied Probability
Official sources · L&S
Letters & Science Academic Requirements (LASAR)
L&S uses LASAR (Letters and Science Academic Requirements), not CoE GEAR. Download LASAR from DUELS for your catalog year.
180–184 quarter units (184 if Area B foreign language completed at level 3) · 60 upper-division units · GE Areas A–G + special subjects (WRT, EUR, NWC, QNT, ETH)
Official major sheet — 2025-2026
Parsed from department major sheet. Verify on GOLD progress check.
Pre-major
30-32 units- MATH 2A · 4 units (or MATH 3A)
- MATH 2B · 4 units (or MATH 3B)
- MATH 4A · 4 units
- MATH 4B · 4 units
- MATH 6A · 4 units
- MATH 8 · 5 units (or PSTAT 8)
- PSTAT 10 · 5 units
2.5+ UC GPA on pre-major courses. Max two pre-major repeats (one per course).
Grade B or better in one of MATH 4A/4B/6A/6B required for MATH/PSTAT 8.
Preparation for the major
8 units- CMPSC 8 · 4 units (or CMPSC W 8)
- CMPSC 9 · 4 units (or CMPSC 16)CMPSC 9 recommended over 16
Both CMPSC 8 and 9/16 required with C or better.
Probability and statistics core
16 units- PSTAT 120A · 4 units (or PSTAT W 120A)
- PSTAT 120B · 4 units
- PSTAT 122 · 4 units
- PSTAT 126 · 4 units
PSTAT electives
24 units required- PSTAT 130
- PSTAT 131
- PSTAT 160A (or PSTAT W 160A)
- PSTAT 160B
- PSTAT 174 (or PSTAT W 174)
- PSTAT 175
Mathematics / related electives
8 units required- MATH 104A
- MATH 117
- MATH 118A
- ECON 100B
- ECON 101
8 units from approved PSTAT, MATH, or ECON list on major sheet.
- • BS track (48 UD units). BA track requires 36 UD units — see department.
Major regulations
- Pre-major GPA
- 2.5+ UC GPA on pre-major courses
- Major GPA
- 2+ in all prep and upper-division major courses
- Minimum grade
- C or better in major courses
- P/NP grading
- Not allowed for major courses
Courses that do not count
Department faculty
Planning context for Statistics & Applied Probability. Full bios stay on the official site.
Key contacts
Probability; stochastic processes; stochastic differential equations
Research aligned with your path
Faculty whose focus overlaps common career outcomes for this major.
Asymptotic statistical inference; nonparametric models.
- Alexander Franks ↗amfranks@ucsb.edu
Associate Professor
causal inference; Bayesian statistics; covariance estimation
- S. Rao Jammalamadaka ↗rao@pstat.ucsb.edu
Distinguished Professor
Mathematical statistics; probability
Statistics of space-time processes; evaluation of geophysical models; environmental statistics
- Annie Qu ↗aqu2@ucsb.edu
Professor
Recommended 4-year plan
180–184 quarter units (184 if Area B foreign language completed at level 3) · 60 upper-division units · GE Areas A–G + special subjects. GE/LASAR slots fill quarters below ~12 major units — verify on GOLD.
Year 1
Fall
Winter
Spring
Year 2
Fall
Winter
Spring
Year 3
Fall
Winter
Spring
Year 4
Fall
Winter
Spring
Interactive graph shows prerequisite chains from the major sheet.
View roadmap graph →College-wide LASAR rules (GE, writing, 180+ units) apply in addition to the major requirements above. See LASAR and DUELS degree requirements.