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BIOSTAT 255AAdvanced Probability and Statistics

Biostatistics · 4 units · Graduate courses (200-299)

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Survey of probability theory, with special emphasis on applications to biostatistics. Topics include probability spaces and random variables, generating functions, conditioning, discrete-time martingales, applications to finite sample analysis of statistical procedures.

S/U or letter grading.

When it runs

Not on the schedule for any of Fall 2025 through Spring 2027. UCLA publishes only that window, so this does not mean the course is gone — check the official listing.

Requisites

Official UCLA wording

Requisites: course 202A or equivalent, Mathematics 131A or consent of instructor.

BruinTree reads · Prerequisite

needs reviewconfidence 0.50 · from text
all of
  • one of
    • BIOSTAT 202A
    • equivalent
  • one of
    • MATH 131A
    • consent of instructor
  • · could not read "equivalent" (no course number found)

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About BIOSTAT 255A. We read UCLA’s requisite wording by machine, and it gets things wrong.

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Requires

Everything that has to come before this course, not just the courses named in the requisite above.

BIOSTAT 255A

  • BIOSTAT 202AMathematical Statistics A
  • MATH 131AAnalysis
    • MATH 32BCalculus of Several Variables
      • MATH 31BIntegration and Infinite Series1 more beneath
      • MATH 32ACalculus of Several Variables1 more beneath
    • MATH 33BDifferential Equations
      • MATH 31BIntegration and Infinite Seriesanother path to it

2 direct requisites. Showing 7 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

BIOSTAT 255A

  • BIOSTAT 250CMultivariate Biostatistics
  • BIOSTAT 255BAdvanced Probability and Statistics
    • BIOSTAT 250CMultivariate Biostatisticsanother path to it
  • BIOSTAT 270Stochastic Processes

3 courses list this as a requisite. The whole downstream is here — 4 courses over 2 levels. Every course here opens its own tree.