Posts in March, 2011
Units 4-5; Ch 16-20
February << | >> April

Thursday March 31, 2011

Choose from the following options...
1. Binomial/Geometric Assessment
2. Hypothesis Testing Assessment
3. Graduation Party - save the Excel sheet to your H: drive to make things easy. Directions are in the file.

4. Projects - Unit IV or Unit V


Wednesday March 30, 2011


Perform your test on your observed sample proportion (p-hat) for the proportion of times the toast landed buttered side down.
Projects

Tuesday March 29, 2011

Mr. C's Hypotheses.....

Monday March 28, 2011

Formalizing Hypothesis Tests

Friday March 25, 2011

One of 3 options...
Reassessment
Unit V Assessment - One Proportion Z-tests
Projects - Unit IV and Unit V

Thursday March 24, 2011

Announcements
  1. Reassessment Tomorrow! Complete the form if you plan on reassessing. Make sure you Re-learn
  2. Grades (boo!) - if you'd like to "improve your grade" for the 3rd marking period, make sure you get your Unit IV projects posted by next Friday
What we're doing
1. Who has made appropriate conclusions - yesterday's P-values and rejection decisions
2. Formalization - need one "note-taker" for each skill listed below (please don't make me randomly generate)
3. Teacher Tattoos again...project opportunity
  • Apply the process above...
  • You will need to conduct a random sample of teachers

Wednesday March 23, 2011

1. Test your hypothesis - Tack Tossing (Skill 20.1, 20.2, 20.3, 20.4)
  • What did you think it was? (the claim you're testing)
  • What did you observe? (the proportion of heads you actually got through sampling)
  • What's the probability of observing your sample statistic according to YOUR model
    • Write those probabilities on the board, and whether or not you rejected your original hypothesis
  • Use the slideshow below if you need a refresher
  • Here is the data if you forgot what you hypothesized/got for your sample: Tack Tossing Data

2. Conditions (20.2) / Conclusions
3. So what is the true proportion?

Tuesday March 22, 2011

Choose one of the four options below.
1. Re-learn some stuff from Probability Distributions
2. Re-learn some things from a previous chapter
3. Unit IV Projects
4. Wiki Edits - add CONTENT not just organization to the class wiki. Look at each skill page and decide if there is enough there.

Monday March 21, 2011

1. Binomial vs Normal Distribution
2. Writing a null and alternative hypothesis (Skill 20.1)
3. Conditions for the Normal model (Skill 20.2)
4. Determining probability of your sample proportion (Skill 20.3)


Thursday March 17, 2011

EVERYONE
1. Brackets - Unit V Project
2. Hypothesis Testing Intro - Tack Tossing (Skill 20.1)

OPTION OF 1 (WHEN FINISHED ABOVE TASKS)
3. Projects
4.Geometric and Binomial Probability Assessment (look at it and see what you can do)

Wednesday March 16, 2011

1. Binomial vs. Normal Probability calculation (Skill 17.3)
  • Determine both binomial probability and normal probability
    • n = 6, p = 0.3...P(X<=2)
    • n=30, p = 0.3...P(X<=12)
    • n = 250, p = 0.3...P(X<=70)
2. For each model given, convert to a model of sample proportions (Skill 16.3)
  • What's the new mean?
  • What's the new standard deviation?
3. Is the normal model appropriate to use to calculate probability?
  • n = 10, p = 0.6
  • n = 25, p = 0.95
  • n = 500, p = 0.1
  • n = 25, p = 0.5
  • n = 30, p = 0.007
4. Hypothesis Testing Intro - Tack Tossing (Skill 20.1)
  • Complete the form for tossing thumbtacks (Form on Skill 20.1 page)

Friday March 11, 2011

Today's Skills
Skill 18.1 - Sampling Distributions
Skill 18.2 - Central Limit Theorem

1. Reassessment
2. Larger Samples - Size 50
  • Compare the mean and standard deviation for all companies to the "mean and standard deviation of the sample means"
    • "Mean of the sample means" - the average of the averages displayed
    • "Standard deviation of the sample means" - the standard deviation of the averages

3. Stat Projects - Unit IV

Thursday March 10, 2011

Skills for Today
Skill 18.1 - Sampling Distributions
Skill 18.2 - Central Limit Theorem

1. Reassessing tomorrow? Complete the reassessment form (found here) by 6pm tonight
2. Discussion Post: Ask a question
3. CEO Compensation Activity

4. Larger Samples - Size 50
  • Compare the mean and standard deviation for all companies to the "mean and standard deviation of the sample means"
    • "Mean of the sample means" - the average of the averages displayed
    • "Standard deviation of the sample means" - the standard deviation of the averages
5. Discussion Post: What'd you learn?


Wednesday March 9, 2011

Skill 17.3: Binomial Distributions
1. Create a new "Presentation" in Google Docs
  • PrntScrn, Paste in Paint, save as .jpeg, insert image into Google Presentation
  • Presentation - Binomial Distributions - Google Presentation
    • Work in Google Docs "privately"
    • When your slide is complete, go into the presentation link above, choose "Insert"->"Import Slides"
    • Find your slide and import it into the presentation
2. Reflect on the presentation - what are we seeing? (shape, center, spread)3. Free Throw Shooters (on board)
  • You're an 80% free throw shooter - shoot 5 shots, how many do you make?
    • 10 shots?
    • 20 shots?
    • 50 shots?
Skill 18.1 - Sampling Distributions
1. CEO Compensation Activity
2. Larger Samples - Size 50

Tuesday March 8, 2011

Skill 17.3: Binomial Distributions
Bionomial Distributions(Pascal's Triangle)
1. Get laptops
2. Odd or Even - how many ways can you arrive at each square?
3. Success/Failure Tree
  • Binomial Formula
  • Easy way in calculator
4. Practice calculating binomial probability
  • Create a display in Excel for each set of parameters
    • "CHOOSE(n,x)" if you need it
    • Suggestion: Calculate probability in your calculator, then type them into Excel
    • Mr. C will show how to create a chart when you are ready
  • Create a new "Presentation" in Google Docs
  • PrntScrn, Paste in Paint, save as .jpeg, insert image into Google Presentation
  • Presentation - Binomial Distributions
    • Work in Google Docs "privately"
    • When your slide is complete, go into the presentation link above, choose "Insert"->"Import Slides"
    • Find your slide and import it into the presentation

Monday March 7, 2011

(Senior Skip Day)
16.3-16.4 Check-In
Skill 17.3: Binomial Distributions

Friday March 4, 2011

Reassessment
Check answers to 16.1-16.4 Assessment
  • Discuss your answers and questions you have with some people sitting next to you
  • In your own Google Doc, make corrections, and also comment on things you may not understand
  • Wrap-up Discussion With Class - VARIANCES ADD!!!!
  • Helpful Hint: If you calculate the standard deviation of a random variable, square it so that you'll also calculate the variance
  • VARIANCES ADD...ALWAYS!
Skill 17.2: Geometric Distributions: # of trials until the first success
Skill 17.3: Binomial Distributions: # of successes in "n" trials

Thursday March 3, 2011

1. Play 20 games of Rock-Paper-Scissors with a partner
2. Enter Data from past few days: Probability Distributions Data Collection Form
3. Skill 17.2: Geometric Distributions: # of trials until the first success
4. Skill 17.3: Binomial Distributions: # of successes in "n" trials
5. Contribute to this document during class: Probability Distributions Google Doc
  • Add only things that help you or your classmates
  • No need to type anything that's not statistics related
  • You need to be a contributor, don't wait for anyone else to do it
  • Doesn't matter if something is right or wrong...IT WILL GET FIXED. Plus, nobody cares if you type something that's incorrect

Wednesday March 2, 2011

1. Absent Yesterday? Do this first: 16.1-16.4 Assessment: Red Lights
  • 1st: Lindsay, Alec
  • 2nd: Julia, Kristen, Chelsea
  • 3rd: Kelsey
2. Unit IV Project Workday
3. Complete the Reassessment Form if you want to reassess on Friday

Tuesday March 1, 2011

1. 16.1-16.4 Assessment: Red Lights
  • Get a laptop and complete the assessment
  • Mr. C will be walking around to chat with each of you
2. Geometric Distributions
3. Binomial Distributions
Rock-Paper-Scissors

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