Class Notes (839,574)
Canada (511,407)
Psychology (7,818)
PSYA01H3 (847)
Lecture 10

Psychology Lecture 10.docx

2 Pages

Course Code
Steve Joordens

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Psychology Lecture 10 (finishing chapter 2) Study the textbook for the midterm. The lectures are a way to help you through understanding the content in the book. Active studying- you take notes while reading the book, or write a M/C question (which is a good method to maximize your study). You can also rely on the external links on portal to get some extra questions. Mode: what there is the most of in a sample. You use all three (mean, median, mode). How closer to the data points to each other are the numbers? How typical are they? Slide 30: the first set in the example has values that are close together, but the second set has a wider range. If you considered them as an age range for example, and one set represents the age in a classroom, it would be more difficult to teach the second group because they have such a large age range (how do you teach a 5 year old what you teach a 20 year old at the same time?)  M.A.D.: mean absolute deviation- you take each deviation point, subtract the mean from it, and takes an absolute value of that to see how far it deviates from the mean. Ex: first set from the ex. 18, 19, 20, 21, 22 mean=20. Deviation: -2, -1, 0, +1, +2 mean=0 If you just ask how far you are from the mean, it’s always zero. That’s why there needs more mathematical concepts involved in variability. You remove the sign and just add up the deviation (now called absolute deviation) deviation mean=1.2 Variance does not use the absolute deviation, but gets rid of signs by squaring the numbers. Ex: first set’s square deviation: 4,1,0,1,4 mean square deviation=2 what does that mean? Take the square root (standard deviation)= 1.41. Now it’s a little closer to M.A.D. Variance and standard deviation are preferred over M.A.D. among statistical methods. Slide 27-30 are considered descriptive statistics. However, scientists use a different method: Inferential Statistics Slide 31: person of interest is suspected for cheating on you. What do you do if you’re not sure
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.