- Wednesday/Thursday = Sampling Vocabulary
- Sample, Sampling Frame, Population
- Sample Statistics v. Population Parameters
- Sampling Variability (aka Sampling Error)
- Randomization
- Friday = Sampling Methods
- Simple Random Sample (SRS)
- Census
- Stratified Random Sample
- Cluster Random Sample
- Systematic Sample
- Voluntary Response Sample
- Convenience Sample
- We will have a quiz that looks very much like this to start class one day next week--this is a practice version of that quiz!
- Thursday HW:
Midterm grades are in! Here's everything you need to know about the midterm (and your homework due Friday):
To score the midterm I first calculated each raw score (%); the multiple choice section had 28 questions for 28 points and counted as 50% of the overall grade. The free response section consisted of 5 questions worth a total of 20 points, and also counted as 50% of the overall grade.
I then used past AP exam "cut scores" to establish the cutoff values for a score of 5, 4, 3, 2, and 1 (see below)--in other words, I figured out which raw scores (%'s) corresponded to which AP scores. Next, I listed each score from greatest to least, and separated the scores (5's, 4's, 3's, etc.)--a projected score of 5 translates to an A, a projected 4 to a B, a projected 3 to a C, a projected 2 to a D, and a projected 1 to an F. Finally, within each AP score/letter grade, I determined a numerical grade equivalent as shown in the chart below.
Students typically performed better on the multiple choice section; overall, we did pretty well with the multiple choice, but definitely will have to make a conscious effort to improve our writing and written communication for the free response section.
The midterm exam will hopefully prove itself to be a valuable learning experience that will help us better prepare for the AP exam; overall, 40/78, or 51.2% percent of students projected to earn a qualifying score (3 or above) on the AP exam.
I will hold on sharing my thoughts, as for homework on Thursday night you will be asked to complete a reflection on the midterm exam. After you develop your own thoughts we will discuss the midterm in more depth on Monday, 1/22.
Here is our midterm exam summary data:
You can use the chart below to determine your raw score from the grade entered in PowerSchool.
- These questions can be completed and turned in Monday for EXTRA CREDIT (homework and 2 stamps).
- You must write the question OR write the heading bulleted below each question
- No question/heading written, no extra credit
1.
Record your projected AP score and your raw score below. (You will have to read
the information on the blog to determine these).
- Projected AP Score:________ Raw Score:_______%
2. Calculate the z-score for your raw score using the data above. Show your
work below.
- z = ___
3. What are your initial reactions to your individual exam score? Record at
least three thoughts in the space below.
- Initial Reactions: Individual Score
4.
Examine the data above; what are two positive things that stand out to you
about our overall midterm exam performance?
- 2 Positives: Overall Performance
5. What is something that stands out as an area (or two) for improvement for our overall
performance?
- Area to Improve: Overall Performance
6. What are two things you have done well individually in preparing for success
in AP Stat over the course of the first semester?
- Individual Preparation: 2 Successes
7. What are two things you can improve upon (moving forward) to put yourself in
the best position to succeed on the AP exam in May?
- Individual Preparation: Areas to Improve
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