- This homework will be counted triple! This will be one of our last homework grades of the quarter, so let's get it done and make it count (triple)!
- One of the biggest challenges on the AP Stat Exam is the Investigative Task; this is our first exposure to this type of question
- The Investigative Task is designed to take 25 minutes and counts twice as much as a "regular" free response
- The Investigative Task is also designed to incorporate things you have not directly learned in class; you are challenged to take your statistical knowledge and apply these ideas in a new context
- You'll see some familiar stuff, and some "new stuff..."
- For example, in this question we definitely learned what we need to know to answer part a, b, and c
- Parts c, d, and e challenge us to use ideas we've learned in class in new ways!
- The key to success on the Investigative Task is to TRY! Don't leave anything blank; some of this stuff is supposed to look foreign to you--use your knowledge of Stats to come up with some solution!
Homework Step 1: Complete the 2016 Investigative Task! (if you really want some authentic practice give yourself a 25 minute timer! I think most of us could do this one in less than 25 minutes!)
Homework Step 2: Score your 2016 Investigative Task
- Read the 2016 AP FR Scoring Rubric (click me!)
- First, read through the entire solution examples and scoring rubric (pages 17-20)
- Then, go back and re-read the scoring sections
- Score each section (section 1 = a/b, section 2 = c/d, section 3 = e) as E (essentially correct), P (partially correct), or I (incorrect)
- Then use page 20 to give yourself an overall score of 1-4 based on your scores on the 3 sections
- USE A DIFFERENT COLOR PEN/PENCIL TO SCORE YOUR RESPONSES!
Here's the FR question in case you lost yours or were out:
STAMPS ARE DUE WEDNESDAY!
Here's the process for turning in your stamps:
- You can turn them in as early as Monday--if we have stamps Monday/Tuesday I'll just add them to your total
- Count up your stamps!
- You are literally counting stamps--so if there's no stamp on a paper it doesn't count! If there are two, that's 2 stamps!
- Get all your stamps together--put them in a ziploc bag, a folder, staple them together--whatever works
- Write your name and the total on the front!
- Double check your counting...
- I will randomly select 5 students in each class to check totals...
- If your total is incorrect you will be given a 0--so pay attention to detail and double check when you count!
- You will get all of these papers back so don't worry if there are notes on them!
And finally, here's an extra credit stamp you can try (and turn in on Monday)--I'll give you one stamp per (completely) correct response!
- When you have to interpret the residual in a sentence (part c) be sure to reference what value you predicted for, what you were predicting, and if the prediction was an over or underestimate
- Use this example based on #4 from yesterday's stamp (predicting income based on years experience)...
- Residual for 0 years experience = $-5K
- "The predicted income for 0 years experience was overestimated by $5K."
- The calculator screen shows the LinReg results for this data (to save you some time)
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