Posts In October, 2010

Units 1-2; Chapters 5-7
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Friday October 29, 2010

Skill 7.1 - Know the definition & properties of correlation (correlation coefficient)
Objective - Recognize when interest in the pattern of possible relationship between 2 quantitative variables suggests making a scatterplot
Objective - Know how to identify the roles of the variables and to place the response variable on the y-axis and the explanatory on the x-axis
Objective - Know how to make a scatterplot by hand (for a small set of data) or with technology
Objective - Understand how the magnitude of the correlation reflects the strength of a linear association as viewed in a scatterplot
Objective - Know how to compute the correlation of two variables
Objective - Know that the correlation has no units
Objective - Know that the correlation coefficient is not changed by changing the center or scale of either variable

Guess the Ages Activity
  • While you are logging onto the laptops, guess the ages of celebrities on paper
  • Once you have completed your guessing, enter your guesses into the form below
  • Mr. C will tell you the actual ages
  • Open Fathom and construct a scatterplot of Guessed Age(x-axis) vs. Actual Age(y-axis)
    • Short demo on how to do this in Fathom
  • Display scatterplot on board while students look at their own on laptops
    • What perplexes you, what do you want to know more about, what questions do you have, what comments can you make?

Homework
Begin reading Ch. 7 and post in the discussion forum for the Unit II Skills Page
Cool Idea: Make this organizer in Google Docs, share it with a few other AP Stat students, and complete/edit it while you're reading/learning



Thursday October 28, 2010

Unit I Assessment

Wednesday October 27, 2010

Unit 1 Take-home Test Review



Tuesday October 26, 2010

Normal Model Level 5: Just given two cutoff percentages, find the mean and standard deviation
Calculator Refresher
Homework
Work on Unit I Test(given in class yesterday)...should be completed by Wednesday October 27 (be prepared to discuss in class)


Monday October 25, 2010

Normal Model Wrapup
  • Percentile from z-score
  • z-score from percentile
  • middle %'s and IQR
  • Find mean and standard deviation that are unknown

Homework
Work on Unit I Test(given in class today)...should be completed by Wednesday(to be discussed in class)

Week at a glance - Tuesday: PSA work (add in the Normal model), Wednesday: Refresher on tough topics, Thursday: Unit Assessment(random selection of previous skills), Friday: PSA work

Friday October 22, 2010

Re-assessment
Non-reassessing
  • Please share your Box Office Mojo project with jasonchri "at" gmail "dot" com
  • Collect data and see if the Normal model is appropriate
  • Exercises to collect data on from Ch. 6
    • 1, 4, 15, 16, 40, 43, 46

Thursday October 21, 2010

Re-Learning Day
  • Small groups to work on skills we aren't masters of - show spreadsheet on board
  • Be an expert - lend your talents/services to another group
  • Consult with your Google Docs - read Mr. C's comments and make some notes to yourself
  • Wiki organize - make one page per skill (Unit I skills)
    • What to include? Lessons, quiz questions, notes, etc
    • There are Powerpoint files in G:Courses\AP Stat-Christiansen
  • Public service announcement
  • Periodic interruptions for whole class chat of certain skills
  • Ch. 5 Quiz discussions
  • The Normal Model tasks
    • Exercises from Ch. 6 Data Collection



Wednesday October 20, 2010

Objective: Know how to find the percentage of observations falling below any value in a Normal model using a Normal table or appropriate technology
Use yesterday's histogram to approximate % within 1, 2, and 3 standard deviations of the mean
  • Unimodal and symmetric distributions with no outliers can all be modeled with the same standard Normal model
    • Mean = 0, Standard Deviation 1
    • Model is in terms of z-scores
Each partnership has a laptop - use to answer questions about how to read a z-table

Homework
Complete Ch. 5 Quiz in preparation for re-learning day tomorrow
Finish reading of Chapter 6
Post a discussion in the Discussion tab of the Unit I skills page of one idea, question, comment, etc that relates to material in the reading of Chapter 6 OR answer someone else's post - continue discussions if necessary, keep checking back
Complete Reassessment Form (which two skills will you be re-assessing on Friday?)

Tuesday October 19, 2010

Recap of College Admissions Activity

Objective: Be able to explain how extraordinary a standardized value may be by using a Normal model
Objective: Be able to use Normal models and the 68-95-99.7 Rule to estimate the percentage of observations falling within 1, 2, 3 standard deviations of the mean
Last out of Roy Halladay's No-hitter

1. Use histogram to find % time teams got less than, greater than, and between a certain number of hits
2. Standardize the x-axis to a mean of 0 and a standard deviation of 1

Homework
Finish reading of Chapter 6
Post a discussion in the Discussion tab of the Unit I skills page of one idea, question, comment, etc that relates to material in the reading of Chapter 6 OR answer someone else's post
Complete Reassessment Form (which two skills will you be re-assessing on Friday?)


Monday October 18, 2010

Objective: Know how to compare values of two different variables using their z-scores

The Final 8 Applicants to your college, determine who gets in
  • You sit on a 3-person admissions panel
  • You must make a decision based on statistical analysis to decide who you will accept into your university
  • Who Will You Admit?
Homework
Finish reading of Chapter 6
Post a discussion in the Discussion tab of the Unit I skills page of one idea, question, comment, etc that relates to material in the reading of Chapter 6 OR answer someone else's post

Friday October 15, 2010

Objective: Recognize when standardization can be used to compare values
1. Give a 5 number summary, mean, and standard deviation and have students scale it to a mean of 0 and standard deviation of 1
2. Look at actual data and see how many standard deviations from the average each person is

Homework
Finish reading of Chapter 6
Post a discussion in the Discussion tab of the Unit I skills page of one idea, question, comment, etc that relates to material in the reading of Chapter 6 OR answer someone else's post

Tuesday October 12, 2010

Standardizing Observations
Time given to work on/complete/share Box Office Mojo project (with jasonchri "at" gmail dot com)
Homework
Begin reading of Chapter 6
Post a discussion in the Discussion tab of the Unit I skills page of one idea, question, comment, etc that relates to material in the reading of Chapter 6 OR answer someone else's post

Friday October 8, 2010

Public Service Announcement
Box Office Mojo


Thursday October 7, 2010

Unusual Features aka Outliers
  • View some images with unusual features. Decide who/what is unusual about them.
  • Collect some data on height
  • Decide which heights you'd consider too high, too low, typical
  • What's YOUR cutoff for too high, too low
  • Define a real cutoff
Homework
Read The Mathematician's Lament by the end of the year

Wednesday October 6, 2010

Work on your Public Service Announcement project
Work on your Box Office Mojo
You have more than enough to do between these two projects that you should not be doing anything but work on these two things.
Homework
1. Look at phone bills from the past 12 months, and record the number of text messages you sent each month
2. Complete re-assessment form by Wednesday October 6 at 3pm


Tuesday October 5, 2010

Summarizing Distributions
The Links
  • Voting: http://poll.fm/2ax9r
  • In Class Data Collection - Major League Baseball
    • Record number of runs scored in the last 10 games
    • Enter it into Fathom
    • Generate a box plot, a histogram, and a summary table calculating mean and standard deviation
  • End of Lesson - Box Office Mojo
    • A histogram AND a box plot
    • A description of the shape of the distribution
    • A description of the center of a distribution using a numerical measure selected based upon the shape
    • A description of the spread of a distribution that is consistent with the chosen measure of center
    • Note any unusual features (such as outliers) and defend why they are outliers using the 1.5IQR rule
    • The Product
      1. One word document titled – Last Name_Class Period_Describing Distributions Numerically
      2. Copy and paste your displays from Fathom into the word document
        1. Print screen and crop
      3. Create a folder in Google Documents called “Last Name_Class Period_Portfolio”
      4. Upload your word document to your portfolio
Homework
1. Look at phone bills from the past 12 months, and record the number of text messages you sent each month
2. Complete re-assessment form by Wednesday October 6 at 3pm
3. Box Office Mojo Assignment to be turned in Friday October 8
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Monday October 4, 2010

Divide class into 2 teams
Throw erasers at small target on the board
  • Measure linear distance for each player on each team (in inches)
Who is the most accurate team?
  • Number of bullseyes
  • Consistency

Friday October 1, 2010

Reassessment Discussion
Project Introduction - Public Service Announcement
Displaying and describing a quantitative variable
  • Something that's meaningful, would make a good public service announcement
  • Brainstorm ideas
  • Collect data, create two displays (histogram and boxplot), describe the distribution(shape, center, spread)
  • Done in the format of a 1 minute public service announcement (video)
  • PSA Examples
Data Collection and Exploration (Use Gapminder for Starters )
Homework
Generate a Public Service Announcement idea and collect data

A good video rendering site, can only render 1 minute for free.
http://flixtime.com/


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