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Tuesday, January 28, 2020

Tuesday HW!

Vote! When's our test!

  • Ok, so I didn't consider that I scheduled a test for the day after the Super Bowl....some of you may care about that, some maybe not.
  • Monday is truly the day that fits best for our test, but I'll leave it up to you all to vote. You can only vote tonight, I will close the poll tomorrow.
  • If people vote more than one time I will ignore the poll results and our test will be Monday.
  • We can have the test this Friday, but that will cut out one full day of practice/classwork/review to prepare
  • Or we can have the test Monday
  • Or we can have the test next Tuesday; if this is the case we'll still finish the unit on Friday and we'll start some "new stuff" next Monday
  • Vote for Test Day! Click Me!



Here's Tuesday night's homework if you want to get ahead:

  • Since this is our first homework of the third quarter it's going to count double!
    • Half HW grade = DO IT
    • Other half HW grade = grade it and make corrections!
      • If something is wrong don't just mark it wrong--fix it!
      • (And use a different color so I can see your corrections)
  • Sampling Methods Tuesday HW (Click Me!)
  • For #'s 11 and 12 you just have to provide the name of the sampling method (no need for a sentence)
  • For 13a name the method (again)
  • For 13b I need some WELL WRITTEN, NOT LAZY sentences here--think realistically--what might be a problem with this sampling design?
    • Remember, the goal in taking any sample is to collect a sample that represents the population
  • For 15a name the sample
  • For 15b write me a sentence, thinking similarly to 13b (getting us to consider bias)
  • For 13c:
    • Sampling Frame = all people/things that could have been sampled
    • Sample = the people/things that we actually collected data from
    • Population = the "whole group" of people/things we are trying to draw conclusions about based on our sample
  • For 27a you need to write a detailed procedure
    • This is extra important because many of us underperformed on the midterm in describing how to randomly assign treatments; this SRS is essentially the same way you randomly assign treatments
  • For 27b you need to write another procedure!
  • Always check your work!

Want to start off Q3 with 3 extra stamps?
  1. Open the 2019-20 Midterm Scoring and Data Link
  2. Calculate and interpret the z-score for your RAW SCORE.
    • To get your raw score:
      • Look up your (curved) score in PowerSchool
      • Use the conversion chart (in the link above) to work backwards and see your raw score
    • Use the table of summary statistics for the mean and standard deviation for calculating the zscore
  3. Use your notes for calculating/interpreting z score: You ONLY EARN STAMPS IF you CORRECTLY CALCULATE and INTERPRET the z-score (in context). 

What should we take away from this midterm experience?
  • The majority of us need to do a better job preparing for the exam; we can't show up and wing it
  • The midterm was a practice round--we definitely need to do better in May, and we CAN do better in May
  • We're projected at 54.5% qualifying scores; this isn't terrible, but it isn't great. We will strive for great.

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