Intro to Null Hypothesis Significance Testing with z-test
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Intro to Null Hypothesis Significance Testing with z-test
This course is part of Basic Inferential Statistics for Psychology Specialization
Instructor: Mike Stadler, PhD
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What you'll learn
Calculate and interpret t-tests, effect sizes, and confidence intervals from raw data and summary statistics.
Compare and contrast z- and t-distributions, and determine the appropriate test for various research situations.
Develop and generate hypotheses for differences between means and conduct the corresponding tests.
Details to know
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There are 6 modules in this course
This is primarily aimed at first- and second-year undergraduates interested in psychology, data analysis, and quantitative research methods along with high school students and professionals with similar interests.
This course delves into the foundational concepts of probability and statistics, emphasizing the importance of random sampling and the normal distribution. Students will learn to apply statistical methods, including z-scores, effect size, and confidence intervals in the context of null hypothesis significance testing. The course also covers the implications of the central limit theorem and the relationship between statistical power and error types. Table of Contents: Probability and Distributions The Normal Distribution Sampling Distributions and the Central Limit Theorem The Logic of Null Hypothesis Significance Testing Null Hypothesis Significance Testing With the z-test Errors in Null Hypothesis Significance Testing Evaluating Statistical Significance Effect Size, Confidence Intervals, and Power
This module introduces you to your PsycLearn Essentials course. Find out what’s included in this course and how to navigate the modules and lessons. You’ll also learn valuable study tips for successful learning.
What's included
7 readings
7 readings•Total 23 minutes
- Welcome to PsycLearn Essentials•3 minutes
- Survey: What Would You Like to See Next?•2 minutes
- How to Earn Certificates•2 minutes
- What’s in Your Course•5 minutes
- Study Tips for Success in PsycLearn Essentials•5 minutes
- Additional Information•5 minutes
- Representation in Research•1 minute
When do you think about probability? Do you think about games of chance, shuffling cards, rolling dice, the probability of winning a lottery? Or do you think about events in daily life, the probability that you will need your umbrella today, the probability you will make it to an appointment on time when traffic is heavy? Using statistics depends critically on a basic understanding of probability. We need concepts from probability theory to know, for instance, what it means to draw a random sample, or how to estimate how likely it is that we might observe a particular value of a variable or statistic.
What's included
11 videos6 readings7 assignments
11 videos•Total 28 minutes
- Probability Distributions: Observations in Context•4 minutes
- Sampling Errors•3 minutes
- The Normal Distribution•3 minutes
- Calculating and Comparing z-Scores•5 minutes
- Calculating x-Scores•1 minute
- Getting to Know the z-Score Table•1 minute
- z-Score to Percent•2 minutes
- Percentile to x•2 minutes
- Creating a Sampling Distribution•3 minutes
- The Central Limit Theorem Simulation•3 minutes
- The Central Limit Theorem Summarized•2 minutes
6 readings•Total 50 minutes
- Probability•15 minutes
- Getting To Know the Normal Curve•7 minutes
- z-Scores•9 minutes
- Sampling Distributions•7 minutes
- Sampling Distributions and Inferential Statistics•7 minutes
- The Central Limit Theorem•5 minutes
7 assignments•Total 44 minutes
- Check Your Understanding: Probability and Sampling Error•6 minutes
- Practice Quiz: z-Scores I•5 minutes
- Practice Quiz: z-Scores II•5 minutes
- Practice Quiz: z-Scores III•4 minutes
- Check Your Understanding: z-Scores•2 minutes
- Check Your Understanding: Sampling Distributions and the Central Limit Theorem•7 minutes
- Module Quiz: Probability Distributions•15 minutes
In this module, we begin using inferential statistics to test hypotheses. We use the z-test, which compares a sample mean with a population mean, to introduce the concept of statistical significance and the steps involved in determining whether a result is statistically significant.
What's included
4 videos4 readings5 assignments
4 videos•Total 12 minutes
- Introduction to Null Hypothesis Significance Testing•1 minute
- John Arbuthnot’s Null Hypothesis•2 minutes
- Null Hypothesis Significance Test•3 minutes
- The One Sample z-Test•5 minutes
4 readings•Total 35 minutes
- The Logic of Null Hypothesis Significance Testing•9 minutes
- The Steps of Null Hypothesis Significance Testing•6 minutes
- Null Hypothesis Significance Testing With the z-Test•10 minutes
- Statistical Decisions Can Be Wrong•10 minutes
5 assignments•Total 35 minutes
- Check your understanding: The Logic of Null Hypothesis Significance Testing•6 minutes
- Check your understanding: The Steps of Null Hypothesis Significance Testing•6 minutes
- Null Hypothesis Significance Testing With the z-Test•5 minutes
- Check your understanding: Errors in Statistical Decision Making•3 minutes
- Module Quiz: Null Hypothesis Significance Testing•15 minutes
What's included
10 videos9 readings5 assignments
10 videos•Total 35 minutes
- Questions About the Use of Null Hypothesis Significance Testing•3 minutes
- Calculating Cohen's D whiteboard•1 minute
- Confidence Intervals•7 minutes
- Confidence Interval Calculation•2 minutes
- Size of a Confidence Interval•5 minutes
- Statistical Decisions•3 minutes
- Determining Statistical Power•5 minutes
- Sample Size and Power•3 minutes
- Effect Size and Power•3 minutes
- Type I Error and Power•3 minutes
9 readings•Total 35 minutes
- Interpreting a p Value Can Be Confusing•7 minutes
- Effect Size for a z test•7 minutes
- Interval Estimates•1 minute
- Confidence Levels and Confidence Intervals•2 minutes
- Understanding Confidence Intervals•2 minutes
- The Correct Understanding of a Confidence Interval•5 minutes
- The Complement of a Type II Error•3 minutes
- Detecting an Effect•5 minutes
- Gauging Power•3 minutes
5 assignments•Total 35 minutes
- Check Your Understanding: Confusions About Null Hypothesis Significance Testing•5 minutes
- Check Your Understanding: Effect Size•5 minutes
- Check Your Understanding: Confidence Intervals•5 minutes
- Check Your Understanding: Statistical Power•5 minutes
- Module Quiz: Evaluating Statistical Significance•15 minutes
What's included
2 readings1 assignment
2 readings•Total 2 minutes
- Key Terms•1 minute
- References•1 minute
1 assignment•Total 10 minutes
- Course Quiz: Introducing Null Hypothesis Significance Testing With the z-test•10 minutes
This module provides a variety of information and tools from the American Psychological Association (APA) that will help inspire you as you complete your coursework and plan your career goals. Explore APA resources on various psychological issues and scholarly research and writing; a list of sites providing valuable resources on diversity, equity, and inclusion in psychology education and in the professional community; resources on a career in psychology; and links to career opportunities at the APA.
What's included
8 readings
8 readings•Total 19 minutes
- Introduction to APA Resources•5 minutes
- Student Resources•2 minutes
- APA Style®, Research, and Writing•2 minutes
- Students from Diverse Ethnic, Cultural, and Economic Backgrounds•2 minutes
- Psychology Help Center•2 minutes
- Psychology Careers•2 minutes
- Careers and Internships at APA•2 minutes
- Other APA Resources•2 minutes
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