chapter7

chapter7 - Chapter 7 Probability and Samples PowerPoint...

This preview shows pages 1–8. Sign up to view the full content.

Chapter 7 Probability and Samples PowerPoint Lecture Slides Essentials of Statistics for the Behavioral Sciences Seventh Edition by Frederick J. Gravetter and Larry B. Wallnau

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Chapter 7 Learning Outcomes
Concepts to review Random sampling (Chapter 6) Probability and the normal distribution (Chapter 6) z-Scores (Chapter 5)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
7.1 Samples and Population The location of a score in a sample or in a population can be represented with a z-score Researchers want to study whole samples rather than single scores Sample provides estimate of the population Tests involve transforming sample mean to a z-score
Sampling Error Error does not indicate a mistake was made. Sampling error is the natural discrepancy, or the amount of error, between a sample statistic and its corresponding population parameter. Samples are variable ; no two samples are identical.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
7.2 Distribution of Sample Means Samples differ from each other The sample means differ from each other The distribution of sample means is the collection of sample means for all the possible random samples of a particular size ( n ) that can be obtained from a population.
Sampling distribution Distributions in earlier chapters were distributions of sample scores. Distribution of sample means is a

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/08/2011 for the course PSY 216 taught by Professor Cynthiaingle during the Spring '11 term at KCTCS.

Page1 / 37

chapter7 - Chapter 7 Probability and Samples PowerPoint...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online