Stat 241
Engineering Statistics
January 2021

[RStudio@Calvin] [From Class] [Test Info] [Text book/Notes] [Homework] [Gradscope]

Dope Sheets

dope1

Here’s where you can come to find out what’s up each day. Homework assignments are available on the homework page.

Week 1

Thu, January 7

  • Meet on Teams at 2pm.

  • Groups

    • Group 1: James VanHekken, Jonathan Ncha, Liam Austin
    • Group 2: Dat Cao, Anne Ghata, Jonathan Washburn
    • Group 3: Hien Tran, Jared Ruba, Carson Warners
    • Group 4: Matthew Sulka, Megan Gilbert, Hayoung Lee
    • Group 5: Joseph Lewis, Anna Giboney, Alden DeHaan
    • Group 6: Amanuel Chanie, Anjana Sainju, Nana Ama Atobrah

  • Topics of the Day:

    • Introduction to Stat 241

    • Graphical summaries of data

      • Plotting Tutorial (hosted online)

        • Part A (Births) - We went through this part in class.
        • Part B (NHANES) – This will give you a chance to try things with a different data set and lots of specific direction.
        • Part C (more practice) – This will let you explore on your own and introduce a few more “extras”.

      • Alternative (only use if hosted tutorial isn’t working for some reason): Run in RStudio console. Copy and paste one of the commands below – the one for the part you want to do.

        learnr::run_tutorial('PlottingBasics2020A', package = 'StatTutor')
learnr::run_tutorial('PlottingBasics2020B', package = 'StatTutor')
learnr::run_tutorial('PlottingBasics2020C', package = 'StatTutor')

      • Google Presentation for your assignment.

        • Details are in part C of the tutorial.

    • Intro to RStudio and RMarkdown

    • Numerical Summaries of Data

  • Before tomorrow’s class

  • Before Monday’s class

    • PS 1: Do the exercises at the end of Worksheet 2 and submit them via Gradescope. (See the homework page for a summary of homework and when it is due.)

Fri, January 8

  • Topic of the Day: Probability

    • Terminology
    • Probability Simulations
    • Probability Caclulations
    • Conditional Probability

  • Homework for Monday

    • PS 1
    • PS 2 (Now available via Moodle)

Week 2

Mon, January 11

Tue, January 12

  • New Groups

    • Group 1: Matthew Sulka, Joseph Lewis, Jared Ruba
    • Group 2: Anjana Sainju, Jonathan Washburn, Hayoung Lee
    • Group 3: Anne Ghata, Megan Gilbert, Amanuel Chanie
    • Group 4: Alden DeHaan, Jonathan Ncha, Dat Cao
    • Group 5: Nana Ama Atobrah, Carson Warners, James VanHekken
    • Group 6: Liam Austin, Anna Giboney, Hien Tran

  • PSAs (Public Service Announcements)

    • Notes are being updated as we go along – be sure to check the “last modified” time stamp.
    • If you notice something that looks broken, drop me a note so I can fix it.

  • Topics of the Day

    • Summarizing Random Variables – Expected Value (Mean), Variance, and Standard Deviation
    • Normal and other families of distributions; working with distributions in R
      • Worksheet: [HTML]
      • important functions in R: gf_dist(), d____(), p____(), q_____(), r_____(), makeFun(), integrate(), sum()

  • Midterm next Monday

Wed, January 13

  • Midterm next Monday

    • It won’t be the full period: we’ll have class starting at 3:30; test before that.
    • Will cover material through tomorrow’s class.
    • Office hours Saturday at 2pm?
    • More detailed info to come.

  • Topics of the Day

    • Transformation and Combinations of Random Variables
    • Sampling Distributions and Confidence Intervals

Thu, January 14

  • Test Info has been posted

    • Google Doc where you can post questions as you are preparing
    • We will use Moodle/respondus and Gradescope (to submit work).
    • I’ll give you access either to RStudio or (more likely) to a tutorial designed for the test.
    • You will probably find you use R less than you expect.

  • Topics of the Day

    • More about Confidence Intervals
    • Data and distributions
      • Z-scores and normal distributions
      • QQ-plots
      • fitting distributions to data, revisited

Fri, January 15

  • New Groups

    • Group 1: Anna Giboney, Matthew Sulka, Jared Ruba
    • Group 2: Hayoung Lee, Liam Austin, Alden DeHaan
    • Group 3: Anjana Sainju, Carson Warners, Joseph Lewis
    • Group 4: Amanuel Chanie, Nana Ama Atobrah, Anne Ghata, Jonathan Washburn
    • Group 5: Megan Gilbert, Hien Tran, James VanHekken

  • Midterm Info

    • Midterm on Monday: 1:30 - 3:30 [You will have ~ 75 minutes in that interval]
    • We will use Respondus and a tutorial document like this one
      • If you have any issues, you may use your phone to email me or send a chat in Teams. Respondus will flag it, but I’ll know what happened and can deal with it.
      • You may bring some blank paper to work on.
      • No other resources are permitted. (You can use R for calculations, so no need for a calculator.)
      • You do not need to know the means and variances of families of distributions. If you need that information for anything, I will provide it.
    • You will also be able to upload work via Gradescope immediately after the test.
      • Be sure to label things clearly.
    • We will start class at 3:45.

  • Review Day

    • Look at the review problems (5.14 - 5.23) from the text book. Be sure to do problem 5.23.
    • Keep track of progress on the Progress Log.
    • You can also post questions here.

  • Confidence intervals for differences: [HTML]

Week 3

Mon, January 18

  • Test 1

    • 75 minutes.
    • Start after 1:30; end by 3:30.
    • Class starts at 3:45 today.

  • Same Groups as last time

    • Group 1: Anna Giboney, Matthew Sulka, Jared Ruba
    • Group 2: Hayoung Lee, Liam Austin, Alden DeHaan
    • Group 3: Anjana Sainju, Carson Warners, Joseph Lewis
    • Group 4: Amanuel Chanie, Nana Ama Atobrah, Anne Ghata, Jonathan Washburn
    • Group 5: Megan Gilbert, Hien Tran, James VanHekken

  • Topic of the Day: Moving beyond CIs for a mean or a proportion.

    • Worksheet: [HTML]
    • Rejoin main group at 4:40.

  • Note: New homework sheet (for problem sets after Test 1). This is just to save some scrolling.

Tue, January 19

Wed, January 20

  • New Groups

    • Group 1: Anne Ghata, Hien Tran, Anna Giboney
    • Group 2: Amanuel Chanie, Liam Austin, Nana Ama Atobrah, Carson Warners
    • Group 3: Anjana Sainju, Jared Ruba, James VanHekken
    • Group 4: Matthew Sulka, Alden DeHaan, Megan Gilbert
    • Group 5: Jonathan Washburn, Joseph Lewis, Hayoung Lee

  • Topics of the day

Thu, January 21

Fri, January 22

  • Final Exam on Tuesday

    • You have 3 hours sometime between noon and 5pm to take the exam.
    • Will be a mix of Moodle and Gradescope again.
    • As you study you can post questions about the final exam in this Google doc
      • We may look at some of these on Monday

  • Topics of the Day

Week 4

Mon, January 25

Tue, January 26

  • Final Exam
    • You have 3 hours for the exam. You may start any time after noon and must end by 5pm Eastern time.

  1. Definitions selected from Webster’s online dictionary↩︎