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

PY 211: Test 2 Study Guide

by: Jennifer Scheuer

PY 211: Test 2 Study Guide PY 211

Jennifer Scheuer
Elem Statistical Methods
Andre Souza

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

Study guide covering lectures covered on Test 2.
Elem Statistical Methods
Andre Souza
Study Guide
50 ?




Popular in Elem Statistical Methods

Popular in Psychlogy

This 0 page Study Guide was uploaded by Jennifer Scheuer on Tuesday March 22, 2016. The Study Guide belongs to PY 211 at University of Alabama - Tuscaloosa taught by Andre Souza in Spring 2016. Since its upload, it has received 92 views. For similar materials see Elem Statistical Methods in Psychlogy at University of Alabama - Tuscaloosa.


Reviews for PY 211: Test 2 Study Guide


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: 03/22/16
PY 211 Exam 2 Study Guide Chapter 8 Hypothesis Testing Sample statistic is a random variable gt Different samples of the same population have different statistics oCentral Limit Theorem gtGiven a large enough sample random samples of the population mean will form a normal distribution a sampling distribution the mean of that distribution will converge to the true population mean the weighted average of all possible values a variable can take Sampling Distribution gtThe mean of the sampling distribution is the mean of the population gtStandard deviationI standard error of the mean 11 gtAs n increases the variance decreases the precision of the estimate of the statistic increases I 5 o gt Distribution of sample statistics variability of the statistics from one sample to another gtTells us what values are expected under prede ned conditions oHypothesis Testing gtSystematic way to test claims or ideas about a group or population gtDetermine the likelihood a sample statistic would be selected if the hypothesis regarding the population parameter were true gt Four basic steps 1 State the hypothesis 2Set a criteria for decision choose an alpha level 3Compute a statistic 4Make a decision statement about the value of a population parameter Usually states no effects population parameter falls in an alternative ranger of values than the null Good and Bad Hypothesis gtGood hypothesis can be falsi ed IV IV IV gtYou always prove the null to be false not prove anything to be true gtType 1 Error reject the null when it is true falsepositive gtType 2 Error fail to reject the null when it is false false negaUve Chapter 12 Onesample ttest Sample variance can be used as an estimate of the population vadance gt Distribution is positively skewed gtThe sample variance will most likely underestimate gtYou will get a larger 2 when using the sample variance 56 gt i J7 gtT distribution varies as a function of degrees of freedom gtSkewness of the sampling distribution disappears as degrees of freedom increases gtSymmetric around a mean of 0 gtHas thicker tails and is more spread out than normal distribution


Buy Material

Are you sure you want to buy this material for

50 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

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Anthony Lee UC Santa Barbara

"I bought an awesome study guide, which helped me get an A in my Math 34B class this quarter!"

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!"

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

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.