New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Alejandra D. Rocha
Alejandra D. Rocha
GPA 3.1
Advanced Statistics
Anthony Blum

Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

These are my notes for ANCOVA the statistical test for between subjects , one factor , multiple level design, if you want me to add more or do a sample on this just ask me !
Advanced Statistics
Anthony Blum
Class Notes
25 ?




Popular in Advanced Statistics

Popular in Psychlogy

This 2 page Class Notes was uploaded by Alejandra D. Rocha on Wednesday October 7, 2015. The Class Notes belongs to PSYC 4317 at University of Texas at El Paso taught by Anthony Blum in Summer 2015. Since its upload, it has received 27 views. For similar materials see Advanced Statistics in Psychlogy at University of Texas at El Paso.


Reviews for ANCOVA


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 10/07/15
Analysis of Covariance ANCOVA Use ANCOVA for the same type of design you would use ANOVA Between Subjects one factor multiple level design Typically ANCOVA is a more powerful statistical test there is two main reasons to use ANCOVA 1 It is used to increase power of our test with a covariate that is related to dependent variable but not with independent variable 2 It statistically equalize different groups for the levels of independent variable Increases power of ANCOVA ANOVADF ratio independent variable effect chance variability chance variability If we could do something that decreased chance variability with decreasing independent variable then we could increase F more power F 102020302015 I F10551553 ANCOVA changes the way variance is computed ZYMquot2 To do ANCOVA factor with levels eg Temperature hot warm cold dependent variable score for each subject quantity lrelated to the dependent variable something not related to your independent variable I covariate info obtained before the experimentElQuantity not category For ANCOVA we are going to compute regression line between Covariate and Dependent Variable Covariate X axis dependent variable Y Y dependent bX covariate a Variance is computed by subtracting YYhat Yhat point of line corresponding to that Xpoint of the line predicted for the X that corresponds to Y YYhats YM which means bigger F value ANCOVA gives the group differences if all subjects had the same covariate score For ANCOVA to use the equalizing procedure the assumption of homogeneity of regression slopes must hold This means to compute a separate covariate dependent variable regression line for each group the assumption holds if the regression lines of the levels of the independent variable are parallel same slope Equalizing procedure I frequently used used for preexisting groups such as gender religion age homogeneity is usually violated homogeneity of regression lines Using SPSS for ANCOVA Use a column for the dependent variable other for the covariate and other for the independent variable using numbers for the different levels Go to analyzel Click on general linear model univariatel then click on the dependent variable and the fixed factor and covariate length Then look at the table at the main effect which is F of independent variable if it is a big number and if Sig is less than 05 we reject null hypothesis ANCOVA could lose power if you pick a covariate that is related to your independent variable


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Allison Fischer University of Alabama

"I signed up to be an Elite Notetaker with 2 of my sorority sisters this semester. We just posted our notes weekly and were each making over $600 per month. I LOVE StudySoup!"

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.