Assignment for Class 15
Please complete before the next class.
Make sure that you’ve completed all previous HW first.
Show Notes
- in-class exercise [pdf]
The logic of Statement F, for an example:
- If my forearm is 31.5 cm, then my forearm is 4.5 cm longer than average.
- If my forearm is 4.5 cm longer than average, then it’s 1.5 SD (i.e., 3 cm = 1 SD) longer than average.
- If my forearm is 1.5 SD longer than average, then my height is r x 1.5 SD = 0.56 x 1.5 = 0.84 SD above average.
- If my height is 0.84 SD above average, then it’s 8.4 cm (i.e., 1 SD = 10 cm) above average.
- If my height is 8.4 cm above average, then it’s 181.4 cm.
You might find it helpful to think of the steps this way:
- Start with original units for X.
- Convert X to standard units.
- Using the correlation coefficient, convert standard units in X to standard units in Y.
- Convert standard units in Y back to the original units.
Prepare for the Exam
The exam will cover everything since the last exam. Make sure that you have completed and understand the assigned review exercises.
The exam will be multiple-choice, but each question will be based on a review exercise (and some will be very similar or identical).
A Tip: In the past, I’ve noticed that students focus too much on the difficult/complex exercises at the expense of the seemingly “easy” exercises. For each concept, I try to pick a few “trivial” exercises to get you started, some “easy”-to-“moderate” exercises to build your skills, and perhaps a “difficult” exercise to challenge you. Most exam questions come from the easy-to-moderate questions. Don’t overlook those questions.
Expect 3-5 questions from the Exam 1 material, but I will limit myself to only the big ideas from that section.
Bring a pencil and a calculator.
Carlisle Rainey