# Stat 5102 Homework Solutions

## Announcements

New! Tentative solutions to the final re-posted at 10:30 the evening of the exam day. A student told me the answer to question 4 part (d) was wrong. It is now fixed. Also there were a few revisions and expansions of comments (that were not part of the solutions) that were on my laptop at home instead of on my office computer. They have been added. (Follow the Exam Solutions link in the navigation to the left. The user name and password are the same as last semester and the same as announced in class.)

Solutions to the second midterm re-posted (there were only a couple of typos to fix). (Follow the Exam Solutions link in the navigation to the left. The user name and password are the same as last semester and the same as announced in class.)

Grade distributions to the second midterm posted. They are under the either the Exams or the Exam Solutions link in the navigation to the left.

Grades for the second midterm are in the Moodle gradebook.

In addition to the regularly scheduled office hours for Geyer on Wednesday (before class in Ford 356 and after class in Anderson 250). There will be one additional office hour Thursday 1:30–2:30 and two additional office hours Friday 12:30–2:30. These additional office hours will be in Ford Hall, either in my office (Ford 356) or in another room on the same floor if I can arrange a bigger room. There will be a sign on the door of Ford 356 as to where I am if not there.

Solutions to homework assignment 11 posted. (Follow the Homework Solutions link in the navigation to the left. The user name and password are the same as last semester and the same as announced in class.)

New erratum added (under the Errata link in the navigation to the left). Homework problem 10-5 had at various places in the displayed equation where it should have had .

New erratum added (under the Errata link in the navigation to the left). Slide 8, deck 5 had an extra and wrong partial derivative symbol.

New erratum added (under the Errata link in the navigation to the left). As noted in class, slide 86, deck 4 should have said that the parameter it gives the mean, median, and mode for is μ. It now does say that.

New erratum added (under the Errata link in the navigation to the left). The calculations are correct in the solution to homework problem 6-15, but that solution had the false assertion that the log likelihood is strictly convex (this has been deleted).

The second midterm **is not** cumulative. The material it covers begins where the first midterm left off and continues through the material for this homework. That is slide 147, deck 2 through slide 50, deck 4 and homeworks 5, 6, 7, and 8 (hypothesis tests through improper priors). **Warning!** The final exam **is** cumulative. So don't forget the material covered on the first midterm.

New erratum added. Not a mistake and not relevant to the material covered so far. You can ignore it for now.

The in the Moodle gradebook it not weighted correctly and should be ignored. All homework together counts as much as one midterm. Thus the 4 homeworks whose grades have been recorded together count as much as 1 / 3 of the first midterm. The course total will be fixed to make sense at the end of the semester (after final grades are in the gradebook).

Any issues with the grading of the exams should be discussed with the grader of the specific question first. Mr. Bera graded questions 1 and 2, Ms. Liang graded question 3, and Dr. Geyer graded questions 4 and 5. If the issue cannot be resolved in the discussion with the grader, it can then be escalated to the instructor.

Grade distributions to the second midterm posted. They are under the either the Exams or the Exam Solutions link in the navigation to the left.

Grades for the first midterm are in the Moodle gradebook.

Solutions to first midterm re-posted. Comments were added to the solutions for questions 4 and 5 about some of the problems students had with them. (Follow the Exam Solutions link in the navigation to the left. The user name and password are the same as for homework solutions, the same as last semester, and the same as announced in class.)

The material covered on the first midterm is all slides up to slide 146, deck 2 and homeworks 1 through 4 including review problems.

Erratum posted in the errata section in the navigation to the left. Many links were broken on the review session web page. Now fixed.

The web page for the review session is here.

This section does not have a textbook. For more information see the textbook section of the general information page.

## Exam Dates

Exam | Date and Time |
---|---|

First Midterm | Wednesday, October 12, 2016 |

Second Midterm | Wednesday, November 16, 2016 |

Final Exam | 1:30pm–3:30pm Monday, December 19 |

The final exam time is set by the U.

University of Minnesota, Twin Cities School of Statistics Stat 5102 Rweb

## Statistics 5102, Spring 2001, Prof. Geyer

## Announcements

New!Exam grades and grades for the course are finally up.

New!Solutions and grade distributions for the final exam posted.

New! As someone requested, I have made the entire notes available in PDF (palatable dog food) format.

## General Information

## Homework Assignments

## Homework Solutions

## Grades

## Exam Solutions

## Exam Dates

First Midterm | Friday, Mar 2 |

Second Midterm | Friday, Apr 13 |

Final Exam | 10:30am-12:30pm Tuesday, May 8 |

## What the Exam Covers

The second midterm will cover the material since the first midterm. It *is not* cumulative.

Specifically, the second midterm covers Section 9.5 and Chapters 10 and 11 of the notes and the corresponding sections of Lindgren (7.10, 7.11, 8.6, 8.7, 9.1, 9.2, 9.4, 9.5, 9.6. 9.7, 9.10, 10.1, 10.2, 10.3)

The final exam *is* cumulative.

## Old Exams (Spring 2000)

## All the Notes (Fall 2000 and Spring 2001)

New! The entirety of both semester's notes are available in Adobe palatable dog food (PDF) format.

- The file ntoc.pdf contains a complete table of contents for both semesters.
- The file n.pdf contains last semester's notes (Fall 2000). This is the file many of you printed out or got from the copy center at the beginning of the semester. Throw away the table of contents (replacing it with that from and throw away the appendices (replacing all of them with those from ).
- The file n2.pdf contains this semester's notes (Spring 2001). It includes revised versions of all the appendices, including some from last semester.

## Computing

This section is just copied from the 5101 page. It will be revised later.

### Calculators

We will be using computers in the course, mostly in second semester. First semester we will only use the computers like a fancy calculator. In fact it could be replaced by some calculators for all the use we are going to make of it first semester, although most calculators, even expensive ones do not have all the probability distributions we want built in. Two that do are the Texas Instruments TI-83 and TI-83 Plus, but you probably don't want to buy such a calculator just for this course. If you have to buy a calculator, one that can do calculus like a TI-89 or a TI-92 Plus would perhaps be more helpful.

### R and Rweb

The default statistical computing package will be R, which can be used in the lab or downloaded (it's free software), and its web interface Rweb, which can be used in any web browser. If you are familiar with another computer statistics package, you may use that, but the instructor and teaching assistant may not be able to help you with it.

A recently added page explains using R and Rweb to calculate probabilites.

A recently added page illustrates the CLT using Rweb.

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