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

Psy 202-Chapter 6

by: T'Keyah Jones

Psy 202-Chapter 6 Psy 202

T'Keyah Jones
GPA 3.0

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 notes cover the beginning of chapter 6: Introduction to Hypothesis Testing.
Elementary Statistics
Dr. Melinda Redding
Class Notes
elementary statistics, Psychology
25 ?




Popular in Elementary Statistics

Popular in Psychology (PSYC)

This 2 page Class Notes was uploaded by T'Keyah Jones on Tuesday September 20, 2016. The Class Notes belongs to Psy 202 at University of Mississippi taught by Dr. Melinda Redding in Fall 2016. Since its upload, it has received 3 views. For similar materials see Elementary Statistics in Psychology (PSYC) at University of Mississippi.

Similar to Psy 202 at OleMiss

Popular in Psychology (PSYC)


Reviews for Psy 202-Chapter 6


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: 09/20/16
September 20, 2016 Elementary Statistics a) Hypothesis Testing Procedure in which data from a sample are used to evaluate a hypothesis about a population Steps 1. Test: Pick the right statistical test 2. Assumptions: Check the assumption of the test 3. List the hypothesis: List the null and alternative hypothesis 4. Decision rules: Find critical values to determine when to reject the null hypothesis 5. Calculation: Calculate the value of the test statistic 6. Interpretation: State results in plain language For z-test, z-scores are critical values b) Single Sample Z-test Used to compare a sample mean to a population mean when the standard deviation of the population is known c) Assumption 1. Random sample 2. Independent observation (within sample, each individual is independent) 3. Dependent variable is normally distributed in the (general) population Example: N= 20 people M= 8.4 words μ= 7 words (population) = 2 words (population) Does this suggest that the memory drug has an effect on memory (the number of words recalled)? d) Step 1 Single sample z-test e) Step 2 1. Random sample= 20 adults 2. Cases are independent 3. Memory is normally distributed f) Step 3 Null hypothesis Alternative hypothesis H0 H1 H 0 μDrug= 7; the drug does not have an effect on memory H 1 μDrug ≠; the drug does have an effect on memory g) Step 4 Reject null or don’t reject null Assume  = .05 (default value for class)  Alpha level Defines tails of distribution Defines what proportion of distribution to be considered rare Critical region The tail of distribution “Upper critical region”  positive “Lower critical region”  negative 95% region z= -1.96 to z= +1.96 h) Step 5 z = M-μ  z= 8.4 - 7 = 3.13 M 2 √20 Z=3.13 Reject the null i) Step 6 The drug has a statistically significant effect on memory NOTE You CANNOT prove a treatment effect using statistical data


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!"

Kyle Maynard Purdue

"When you're taking detailed notes and trying to help everyone else out in the class, it really helps you learn and understand the I made $280 on my first study guide!"

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."

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.