Yao Li

Assistant Professor

Department of Mathematics and Statistics

University of Massachusetts Amherst

Statistics I (Fall 2019)

Welcome to my class!

Textbook: The required textbook is "Mathematical Statistics with Applications" by Dennis D. Wackerly, William Mendenhall III, and Richard L. Scheaffer. (this is NOT the international edition-if you are using the international edition, you need to always consult for your homework assignments with the library copies on reserve)

Prerequisites: Two semesters of single variable calculus (Math 131-132) or the equivalent, with a grade of "C" or better in Math 132. Math 233 is required for this course. However, some necessary concepts for multiple integration or partial derivatives will be re-introduced in the course as needed.

During the semester, I will use the Moodle system. All announcements, homework assignments and resources will be uploaded on Moodle. At the same time, written homework assignment will be updated on this website.

  • Homework assignment 1 Section 2.3 #2.3, 2.5, 2.7,2.8; Section 2.4 # 2.11, 2.12, 2.16, 2.19, 2.23; Section 2.5 # 2.30, 2.33. Due in class on September 12th.
  • Homework assignment 2 Section 2.6 # 2.43, 2.61, 2.68; Section 2.7 #2.74, 2.75, 2.82; Section 2.8 #2.88, 2.93, 2.102, 2.104. Due in class on September 19th.
  • Homework assignment 3 Section 2.9: #2.115, 2.120, 2.121, Section 2.10 # 2.124, 2.125, Section 3.1-3.2 # 3.6, Section 3.3 # 3.14, 3.15, 3.22. Due in class on September 26th.
  • Homework assignment 4 Section 3.4 # 3.38, 3.57, 3.60, Section 3.5 # 3.66, 3.70, 3.71, Section 3.7 #3.118, Section 3.8 # 3.122, 3.128, 3.138. Due in class on October 3rd.
  • Homework assignment 5 Sections 4.1 -- 4.3 #4.2, 4.16, 4.20 and 4.26, Section 4.4 # 4.41, 4.42, 4.57. Due in class on October 17th
  • Homework assignment 6 Section 4.5 # 4.58, 4.59, 4.63a, 4.66a, 4.67, 4.72, 4.78, 4.80. Due in class on October 24th
  • Homework assignment 7 Sections 4.9-10 # 4.144(a)(c), 4.145(a)(c),4.146, 4.147, 4.150 and Section 3.11 #3.171 and a few additional problems Due in class on October 31st
  • Homework assignment 8 Sections 5.2-5.4 # 5.4, 5.7, 5.8, 5.11, 5.14, 5.22, 5.25, 5.34, 5.43, 5.48, 5.51, 5.55, 5.70. Due in class on November 6th
  • Homework assignment 9 Sections 5.2-5.11: # 5.10, 5.75, 5.78, 5.82, 5.84. 5.91, 5.95, 5.114, 5.123, 5.125, 5.128, 5.136, 5.139, 5.140. Due in class on Nov 19th
  • Homework assignment 10 Sections 6.1-6.4:: 6.1, 6.7, 6.10, 6.18, 6.27, 6.28, 6.29, 6.33, 6.34. Due in class on Dec 3rd
  • Homework assignment 11 Section 6.5: #6.37, 6.43, 6.52, 6.59. Section 7.2: #7.11, 7.12, 7.21, Section 7.3: #7.50, 7.51, 7.52, 7.62, Section 7.5: #7.72, 7.77, 7.87. Due in class on Dec 10th

Please read the syllabus carefully for other information.

Old Exams Below are various exams, without solutions, from Stats 515 in previous semesters. Note that the format, such as number of problems, varies. This is because the course chair also varies. Moreover, the exams dates are not always at the same point in the semester. So for example, some material on midterm 1 from one class might appear on midterm 2 of another class.

  • Here is a link to the Fall 2015 Midterm 1.
  • Here is a link to the Spring 2016 Midterm 1.
  • Here is a link to the Fall 2016 Midterm 1. (in draft form)
  • Here is a link to the Spring 2017 Midterm 1.
  • Here is a link to the Spring 2016 Midterm 2.
  • Here is a link to the Fall 2016 Midterm 2.
  • Here is a link to the Spring 2017 Midterm 2.
  • Here is a link to the Fall 2015 Final.
  • Here is a link to the Spring 2016 Final.
  • Here is a link to the Fall 2016 Final.
  • Here is a link to the Spring 2017 Final.
  • Here is a link to the Spring 2018 Midterm Exam 1.
  • Here is a link to the Spring 2018 Final.
  • Here are two quizzes from Fall 2015, which some students took instead of a Midterm 2 that semester. Quiz , Another Quiz .