Class record · ECON · MCAS

ECON 7770

Statistics · 3 instructors on record · 7 sections

What the course score is made of

89BC evaluations7 records · weight ×1.0 · Fall 2021 – Fall 2025

—Student reviewsno reviews — does not contribute

—RateMyProfessorsno ratings — does not contribute

That is the class itself, averaged across everyone who taught it. Who taught it, and how each of them scored, is the board below — that is what a student picking a section is actually choosing between.

What the challenge rank is made of

71stMore challenging than 71% of BC classesranked against every one we hold

94BC — “Intellectually Challenging”7 records · raw score out of 100

Boston College's own “intellectually challenging” question for this class only — students answer it positively about courses that stretched them, so it measures intellectual challenge and NOT grading, workload or quality. Almost every BC class scores high on it, which is why it is shown as a rank rather than a score.

What the workload rank is made of

78thMore work than 78% of BC classesranked against every one we hold

60BC — “Workload”7 records · raw score out of 100

Boston College reports workload for this class only as one of five bands, not as a number of hours, and it does not publish what the bands mean — so this site will not translate it into hours. Higher means more work, which is not the same as worse.

The first part of this course deals with topics in probability theory, including random variables, conditional distributions, expectation, and multivariate distributions. The second part presents topics in mathematical statistics, including moment estimation, hypothesis testing, asymptotic theory, and maximum likelihood estimation.

The board

3 instructors · ranked on this class onlyCompare the top 3

Scores are real averages. The order also accounts for how many records back each one — the count is under every score — so one perfect review does not outrank a semester of them.

Rank	Instructor	Overall	Workload	Challenge
1	Zhijie XiaoEconomics	935 records	78th	71st
2	Qingsong YaoEconomics Provisional	911 record	—	79th
3	Shengtao DaiEconomics Provisional	791 record	78th	60th

How this board is orderedPositions account for how many records stand behind each number, so one perfect review does not outrank a semester of them. Every score shown is the real average — only the ordering is adjusted. The comparison here is the class itself: a thin record is read against how this class was rated overall, not against the university.

Every instructor with an evaluation record for this class is on this board — it is not a top ten, and nothing is hidden behind a “show more”. Overall is the instructor's blended score for THIS class only, and its one contributing source is Boston College's evaluations for the sections in the row's record count — nothing on this board is an average across the other things they teach. Workload and Challenge are RANKS against every class we hold, not scores: BC's questions all sit near the top of the 1-5 scale, so a raw number would put almost every row in the high eighties and tell you nothing. Challenge is BC's “intellectually challenging” item, which students answer positively about courses that stretched them — it is not a measure of difficulty or grading. Neither column is ever marked better or worse. 2 of 3 rows are marked provisional: fewer than 3 records stand behind the number. That is thin evidence, not a bad instructor — the record count is in every row.

The line

All 13 items · means across 7 records

The Professor4 items

Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.

9349th pctl

Available Outside of ClassThe instructor was available for help outside of class.

9455th pctl

Brings Out Your Best WorkThe instructor motivated me to do my best work.

9351st pctl

Sparked My InterestThe course stimulated my interest in the subject matter.

9446th pctl

The Course3 items

Well-Organized CourseThe course was well organized.

9468th pctl

Clear Learning GoalsThe learning objectives for the course were clear.

9360th pctl

Useful Beyond the CourseWhat I learned is applicable beyond this course.

9673rd pctl

Assignments & Feedback3 items

Assignments Help You LearnAssignments and exams contributed to my learning.

9367th pctl

Gives Feedback PromptlyI received feedback on my work in a timely manner.

9359th pctl

Meaningful FeedbackThe feedback I received on my work was meaningful.

9356th pctl

Workload, difficulty & attendanceNot ratings

WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.

6078th pctl

Intellectually ChallengingThe course was intellectually challenging.

9471st pctl

Attendance MattersAttending class was necessary to do well in this course.

9250th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

Game log

7 sections · newest first

Instructor	Term	Sec	Instr	Course	Work
Zhijie Xiao	Fall 2025	01	91	86	60
Zhijie Xiao	Fall 2024	01	93	88	60
Shengtao Dai	Fall 2024	02	79	87	60
Zhijie Xiao	Fall 2023	01	91	88	—
Zhijie Xiao	Fall 2022	01	93	90	60
Qingsong Yao	Fall 2022	02	91	89	—
Zhijie Xiao	Fall 2021	01	96	92	—

How to read this boardInstructors are ranked on their record in this class only, never on their average across everything they teach. Scores are out of 100 — Boston College's 1–5 agreement scale, ×20, the way these numbers were printed for years. Workload is BC's own five-band figure, not a number of hours, and is shown as a rank. A dash means the question was not reported, and is never a zero.