Math/Stat 242:
Math/Stat 242:
Introductory Statistics
Introductory Statistics
This is a subpage of the Math/Stat 242 Course page. If you need overall syllabus info about Math/Stat 242, click here.
Embedded Files
This is a subpage of the Math/Stat 242 Course page. If you need overall syllabus info about Math/Stat 242, click here.
This course meets in Morken 214
M, W 12:15 - 1:45 pm OR
M, W 2:00 - 3:30 pm
Student hours are
M, W, F 10:30-11:15 am;
Th 11:30-12:15pm;
& by appointment! (in person or virtual)
Announcements
Announcements
You can vote in the Reike Photo Contest! https://forms.gle/4NxZk8oM4LudNLWH7
Mole Day—Nov 3
New groups coming soon, according to project groups. Let me know if you have location/personnel needs to support your learning.
Today: Math class Advising Party (see flyer @ right)
To Do
To Do
Project Part 2 due Wednesday
Email NJ if you need help finding a group for the final project.
If your group <4 NJ may add people to your group.
Oct 27: Two sample z-tests & Pr
Oct 27: Two sample z-tests & Pr
Agenda:
Agenda:
In groups:
What is your (realistic) dream job & why?
Assign roles (TBA)
Use the ISI applet to finish Lesson 10
Discuss Lesson 10: Two-sample z tests (notes)
If time: Chance to work on Project Part 2
Announcements
Announcements
Thanks, Rorie, for the sampling comic (@ right)!
- This would be either non-response bias or volunteer response bias; depending on who took inititative to invite to respond.
Mole Day—I hear it's awesome—Nov 3 (see flyer below)
If you worked in a group on Project Part 1 and received a 0 grade, please just let me know who submitted on your behalf.
New groups coming soon, according to project groups. Let me know if you have location/personnel needs to support your learning.
To Do
To Do
Project Part 2 due next Wednesday
Email NJ if you need help finding a group for the final project.
If your group <4 NJ may add people to your group.
Oct 22: Two sample z-tests
Oct 22: Two sample z-tests
Agenda:
Agenda:
NJ's summary of Midterm Feedback
In groups:
What is your favorite holiday, and how do you celebrate it?
Assign roles (TBA)
Finish Lesson 09
Review of prop.test() function in R.
Lesson 10: Two-sample z tests (notes)
(If time) Contagious Yawns Example
- The applet uses explanatory and response in a certain place in the table
- You can switch it in a table, but not in the applet
Intro/Review: Quarto files (in R)
- Next HW uses Quarto file.
- We will have some time Monday to work on it.
Harding, I. (2005). Helpful Signpost. Licensed under Creative Commons 2.0. https://www.flickr.com/photos/nord_modular/52772616
Announcements
Announcements
Please take care of yourself and your community!
NJ's source of support: https://lc3.com/
I'm happy to chat about non-statistics stuff or point you to resources
Advising week: reach out to your adviser to schedule a meeting!
NJ is happy to meet with anyone interested in statistics minor, Data Science major or minor, Math major or minor, and Applied Math major.
Upper Division Math Classes Teasers: Wednesday in Morken 214 11:45-12:15. (See flyer @ right) Please come!
To Do
To Do
Complete Mid-term feedback (on G.C.)
Quiz 06 (on G.C.)
Start thinking about who you'd like to work with on the project (need at least 1 partner; NJ recommends groups of 3 or more.
Must be in your same section (so you can work together during class)
Consider availability outside of class.
Project Part II coming soon.
Oct 20: Overview of basic tests
Oct 20: Overview of basic tests
Learning Goals:
Learning Goals:
- discern whether a test is a one or two proportion or z or t test.
- write appropriate null and alternative hypotheses for any of the above four scenarios.
Agenda:
Agenda:
How do you feel about scary movies?
Review sampling methods.
Two more sampling methods
Volunteer Response (not recommended!)
Multistage (a great option!)
Lesson 09: Overview of basic tests (notes)
(If time) Lesson 10: Two-sample z tests (notes)
Photo by Johannes Plenio (2018) Two brown trees. Licensed by Pexels: Free to Use. Retrieved from https://www.pexels.com/photo/two-brown-trees-1632790/
Announcements
Announcements
- Mid-semester break Oct 17 (no classes)
- Mid-term feedback is ready on G.C.
- Naufal is available to tutor through Knack! (choose the 231 statistics class)
- Mid-term feedback (1 pt required; 2 pts e.c. for completing it)
To Do
To Do
Submit Project Part 1. (one per group) on G.C.
Complete Mid-term feedback (on G.C.)
Oct. 15: sampling methods
Oct. 15: sampling methods
Learning Goals:
Learning Goals:
- Articulate why randomness is useful for obtaining a representative sample
- Describe and distinguish between the sampling methods: convenience sampling, cluster sampling, simple random sampling, stratified sampling, and systematic sampling.
Agenda:
Agenda:
In groups:
Who is your favorite person right now and why?
If you were trying to pick a group of 5 "representative" trees from the image below, what 5 trees would you choose?
Discussion of HW 05
Discuss the quiz question #2 given below
Change your answer if you like!
Lesson 1X: sampling methods (notes)
Finish project part 1 and submit on Google Classroom
https://www.gapminder.org/dollar-street
Announcements
Announcements
Some groups needed to adjust/move: seating Chart 12:15 class, 2:00 class
- Math Meet up! Oct 15. Free coffee, fruit and donuts in ERB (see flyer @ right).
- PLU Math has a Discord channel! https://discord.gg/8m3Nx4xH
- Mid-semester break Oct 17 (no classes)
- Mid-term feedback coming soon
- Quizzes are back! Quiz due tomorrow
To Do
To Do
HW 05 due today!
Quiz Due tomorrow
Project Part 1 due Thursday
Mid-Semester Feedback Due Friday
Oct 13: Project Part 1
Oct 13: Project Part 1
Agenda:
How to view your grades in Google Classroom
- Click on Classwork
- Click on View Your Work @ top
In groups:
- What is your theme song for today?
- What did the group do well to support you last time?
- What is something I can do to help the group function better today?
- Optional: Help eachother find how to view your grades in Google Classroom
NJ discusses the formula for calculating a CI.
Start Project: Part 1
@ 10 min left: Comments on the Exam
Return Exams
Oleksandr P. (2022) Hand Holding Domino Blocks. Licensed under Pexels: Free to Use. Retrieved from Pexels.
Announcements
Announcements
- Seating Chart 12:15 class, 2:00 class
- Math Meet up! Oct 15. Free coffee, fruit and donuts in ERB.
- Mid-semester break Oct 17 (no classes)
- Mid-term feedback coming soon
- There is a HW due Monday but my plan is to have time in class to work on together in groups & hopefully finish it.
To Do
To Do
HW 05 due Monday (in-class time today; see note above)
Coming soon: Mid-semester feedback
Oct 8: Causal Claims vs. Association Claims
Oct 8: Causal Claims vs. Association Claims
Agenda:
New Groups
Establish roles in groups
how to refer to you
If you could teleport anywhere right now, for 1 hour, where would you go? Why?
If you could bring one person, who would you bring and why did you choose them?
Group Processing
What are your strengths working in groups?
What are your weaknesses working in groups?
How can your group best support you/help you engage?
exchange contact information
Causal Claims vs. Claims of Association (NJ slides)
Work on HW 05 together in groups.
Depolo, Steven. (2009) You Can Do It Lake Huron Beach Oscoda Trip 9-25-09 16. Licensed under Creative Commons 2.0 (link). Retrieved from https://www.flickr.com/photos/stevendepolo/3968766889.
Announcements
Announcements
- Math Meet up! Oct 15.
- Mid-semester break Oct 17 (no classes)
- Mid-term feedback coming soon
- Key is available when you're finished if you want to know roughly how you did on the exam.
To Do
To Do
- email NJ if you have preferences for seating/personnel for project/next groups
Oct 6: Exam 1 (In-Class)
Oct 6: Exam 1 (In-Class)
Agenda:
NJ's Reminder not to use cell phones / not to check cell phones/ turn them off now
Please put computers away. If during the exam you decide you would like to use R, you may log into a classroom computer at that time.
Kaldari (2019). Atlantic horseshoe crab (Limulus polyphemus).jpg. Retrieved from Wikimedia Commons.
Announcements
Announcements
- Exam 1 Take Home portion:
- due by midnight tonight
- (This is a hard deadline!)
- Exam 1: Oct. 6
- NJ will take 20 min to discuss take-home exam trends
- The rest of class time will be for the exam
- In-class exam covers everything through Lesson 6.
- Paper notes are allowed on the exam.
- No HW this week
To Do
To Do
Oct 1: Confidence intervals
Oct 1: Confidence intervals
Learning Goals:
Learning Goals:
Interpret the (purpose and) meaning of a confidence interval
Calculate the confidence interval for a population proportion using a series of hypothesis tests
Navigate the relationships between sample size, the width of a confidence interval, and the confidence level
Agenda:
(If time): Discuss how to calculate a confidence interval using R
(If time): CI interval practice (link).
(If time): Discuss how to calculate a confidence interval by hand.
Announcements
Announcements
Take-home exam due Oct 1.
This is a hard deadline! Scores of 0 once I release scores/solutions to the class!
In-class Exam 1: Oct. 6.
In-class Exam could be tougher than the take-home.
As you study, if you want my solutions to one of the activities, please ask!
No quiz this week
Exam 1 Review is here.
You can thank Alex!
...And tentative solutions are here.
To Do
To Do
Take Home Exam (due Wednesday).
Sept. 29: Z-scores: What is a big deal?
Sept. 29: Z-scores: What is a big deal?
Learning Goals:
Learning Goals:
Use z-scores to assess whether an outcome is unlikely
Discern whether a question asks for a confidence interval or a hypothesis test
Agenda:
Take-home questions?
Discuss standard devation, z-scores (slides): What is a big deal?
https://www.datasciencecentral.com/central-limit-theorem-for-non-independent-random-variables/
Announcements
Announcements
- Seating Chart 12:15 class, 2:00 class
- HW 04 postponed!
- Take Home exam released tomorrow (hopefully)
- Exam 1 coming soon. The exam has two parts:
- Take-home portion due Oct 1
- Can be completed in groups with other students in your class or the other 242 section this semester.
- Recommendation: do no use AI,
- In-class portion Oct. 6
- completed individually
- 60 min class period to complete
- open (printed) notes, open R (but not open internet, no open AI)
- Take-home portion due Oct 1
To Do
To Do
HW 04 Due Thursday, next week!
Take Home Exam (coming soon on G.C.)
Expected release tomorrow.
Let NJ know if Oct 6 is a conflict for Exam 1
Sept. 24: The Central Limit Theorem for proportions
Sept. 24: The Central Limit Theorem for proportions
Agenda:
In Groups:
Your name and how to refer to you
If you had to give a TED talk right now (wiht no preparation), what would it be about?
Discuss questions on the quiz
12:30 class: functions, arguments in R (slides: 02 Script Files & basics)
Lesson 05 (notes)
Homework Questions.
Kaldari (2019). Atlantic horseshoe crab (Limulus polyphemus).jpg. Retrieved from Wikimedia Commons.
Announcements
Announcements
- New Groups Today! Seating Chart 12:15 class, 2:00 class
- (NJ get video ready & test sound)
- We will use R today
- log in to one of the side computers if needed
- Please let me know if I am referring to you incorrectly!
- Exam 1 coming soon. The exam has two parts:
- Take-home portion (tentatively due Oct 1)
- Due the class period before the exam
- Can be completed in groups with other students in your class or the other 242 section this semester.
- Worth about 15% of the exam grade
- Recommendation: do no use AI, so that you can complete the in-class portion successfully
- In-class portion (tentatively Oct. 6)
- completed individually
- 60 min class period to complete
- open (printed) notes, open R (but not open internet, no open AI)
- Take-home portion (tentatively due Oct 1)
To Do
To Do
Quiz (open today at 3pm, due tomorrow)
HW 04 tentatively Due Thursday, bring questions to class on Wednesday!
Let NJ know if Oct 6 is a conflict for the in-class exam.
Sept. 22: Two-tailed tests & R Intro
Sept. 22: Two-tailed tests & R Intro
Agenda:
New Groups:
Your name and how to refer to you
Choose your favorite:
- What is your favorite game? It can be a board game, card game, sport, video game or outdoor lawn game. OR
- What is something you have made or created lately that you are proud of, or surprised by the outcome?
In groups: Summarize what we've done so far in Lesson 04
Finish Lesson 4 (notes)
Intro to R (slides: 01 Intro, 02 Script Files & basics)
Lesson 05 (notes) - you need some of this for HW 04
Kaldari (2019). Atlantic horseshoe crab (Limulus polyphemus).jpg. Retrieved from Wikimedia Commons.
Announcements
Announcements
We will use R on Monday
- bring laptop, or
- log in to one of the side computers @ start of class
To Do
To Do
HW 3 Due Thursday
Email NJ if you have requests regarding groups
Download R/ R Studio
- Read Modern Dive first few sections of Chapter 1 (Stop when it says: 1.2 How do I code in R?)
- Download (or update) R on your computer
- Download (or update) R-Studio on your computer
Sept. 17: Two-tailed tests
Sept. 17: Two-tailed tests
Learning Goals:
Learning Goals:
Discern when the research question calls for a one versus a two-tailed test
Calculate the p-value for a 2-tailed test
Agenda:
- Share how to refer to you
- Which superpower would you rather have & why:
- The ability to breathe under water (and handle the increased pressure at extreme depths)
- The ability to never sleep and function just fine
- The ability to never eat and function just fine
- The ability to control all the ants in the world
Quiz discussion
HW questions
P-value practice
More p-value practice: (link)
Lesson 4 (notes)
wp paarz (2016) Gavel - Courtroom and Gavel. Licensed under Creative Commons 2.0 (link to license). Retreived from flickr (link).
Announcements
Announcements
We will likely start using R next week. (Downloading it is on your to do list)
Classroom computers have R/R-Studio if needed.
- Interest meeting for the International Collegiate Programming Contest (ICPC) Tuesday September 16th at 11:30 AM in MCLT 210
- Specimen Museum on Tuesdays (see flyer @ right)
To Do
To Do
Quiz 03 is on GC (due tomorrow)
HW 03 is on GC (due Thursday).
Take a look and bring your questions to class on Wednesday!
Email NJ by 7pm Sunday if you have requests for seating for the next groups!
Proximity to window or door
Position relative to the screen
Personnel to avoid to support your learning (I don't need details)
Due Soon (next week?)
Read Modern Dive first few sections of Chapter 1 (Stop when it says: 1.2 How do I code in R?)
Download (or update) R on your computer
Download (or update) R-Studio on your computer
Sept. 15: Hypothesis testing for Social Justice
Sept. 15: Hypothesis testing for Social Justice
Learning Goals:
Learning Goals:
Apply statistical tests in ways that can make social change
Set up hypothesis test NOT with 50-50 model
Calculate a p-value and use it to conclude about a statistical question.
Agenda:
Woman Holding Half-full Glass and White Medicine Pill. https://www.pexels.com/photo/woman-holding-half-full-glass-and-white-medicine-pill-576831/
Announcements
Announcements
Seating Chart 12:15 class, 2:00 class
Reike photo contest (see flyer @ right)
Coffee Donuts Fruit (free!) in ERB on September 15 11:45am-12:15pm
NJ is the "Director of Data Science" at PLU. Come see me if you are interested in:
Minor in statistics
Minor in Data Science
Major in Data Science
Major in Applied Math
Major in (Pure) Math
To Do
To Do
HW due Friday @ 3pm
Sept. 10: More Hypothesis Testing
Sept. 10: More Hypothesis Testing
Learning Goals:
Learning Goals:
- Become familiar with Hypothesis Testing Vocabulary
- Identify a null and alternative hypothesis.
Agenda:
In Groups:
Share/remind us how we should refer to you
What is your "theme song" for today?
Quiz from Tuesday: check in with group about any questions you had.
Parameter vs. Statistic practice (link)
Finish Lesson 02 - Lesson notes
Homework 02 questions
If time: Start Lesson 03: A Discrimination case (notes)
Massdaffoni (n.d.) Close-up of two dolphins (1072/19144). https://www.goodfreephotos.com/public-domain-images/close-up-of-two-dolphins.jpg.php
Announcements
Announcements
Seating Chart 12:15 class, 2:00 class
Please let me know if I refer to you incorrectly
- In-person or via email are both great!
12:15 pm class: do you want a smaller class size? Join the 2:00pm class!!!
- Talk to NJ after class if interested
ERB (Math Center) is across from NJ's office & open to all students taking math!
Naufal's contact info:
Let me know if you want to use electronic copies of the notes
Email NJ food allergies
We may adjust the due date of HW to Thursday @ 3pm.
To Do
To Do
Quiz 2 open @8am Monday, due Tuesday 3pm
Check out HW2 and bring questions to class on Wednesday!
HW 2 open @8am on Monday, due Friday @ 3pm
Sept. 8: Hypothesis Testing
Sept. 8: Hypothesis Testing
Learning Goals:
Learning Goals:
- Understand the purpose of running a simulation for a hypothesis test
- Set up an applet to model a null hypothesis
- Interpret the results of a simulation and their relevance to a statistical question
Agenda:
Group Formation/Processing:
Share/remind us how we should refer to you
Share about your favorite pet & why you liked it. (If no pets? Share your Favorite family member or friend)
Syllabus Quiz
12:15pm class: complete Syllabus Quiz
2:00pm class: double check answers b/c there are some incorrect ones!
More intro to hypothesis testing: Buzz and Doris.
01 -Lesson Notes.
If time: formalizing the process
02 - Lesson notes
If time: Hypothesis Testing Practice (link)
Announcements
Announcements
Seating Chart 12:15 class, 2:00 class
Welcome! I am Dr. Justice!
Important websites:
How to reach the syllabus
How to reach this Weekly Content Page
Best way to reach NJ is via email
If you have a question about coursework be sure to include the question prompt in the email.
Student (Office) Hours:
M, W, F 10:30-11:15am
Th 11:30 am-12:15 pm;
& by appointment! (in person or virtual)
Intro Naufal: naufal.alavi@plu.edu
To Do
To Do
Due by Thursday (7:30pm):
Join Google Classroom
Information Sheet (on G.C.) (~10 min)
Read Syllabus
Syllabus Quiz (on G.C.) (~10 min) - postponed to Monday for the 12:15 class.
HW 01 due Friday at 3pm (link available soon). Submit as PDF to Google Classroom
(Rossman, Chance, Medina article is here)
Due Soon (next week?)
Read Modern Dive first few sections of Chapter 1 (Stop when it says: 1.2 How do I code in R?)
Download (or update) R on your computer
Download (or update) R-Studio on your computer
Sept 3: Introduction
Sept 3: Introduction
In Class:
Syllabus Topic: Late work policy
Intro to the Course (slides intentionally not included).
(5 min break)
Intro to Dophins Activity
01 -Lesson Notes.
How to reach Google Classroom (GC)
Syllabus Quiz (in groups) available on GC
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