Chapter 7 Review
NAME:_
1. What is a sampling distribution? Distribution of sample means?
2. What information/characteristics about a distribution of sample means does the Central
Limit Theorem provide?
3. The distribution of sample means is not always a
Chapter 6
Probability
Probability
Definition:
Proportion (or fraction)
of all possible outcomes
Probability of X = # of outcomes
classified as X / Total # of possible
outcomes
Example: Jar of marbles
Fractions, decimals, or percentages
Random Sampling
Ran
PSY 2073 Statistics for Psychology
Exam 2 Study Guide
Chapter 5
What are z-scores?
Why do we use z-scores?
What changes (shape, central tendency, and variability) occur
when transforming a distribution of scores into a z-score
distribution
Be able to
Chapter 7
Probability and Samples: The
Distribution of Sample Means
Populations & Samples
Z-scores
Exact
position
Z-score of sample
Sampling
Out
Error
of many samples, how do we
tell which sample is a better
representation of the population?
Sampling Dist
Chapter 5
Z-Scores: Location of Scores and
Standardized Distributions
Individual Scores
Does
an individual score have
meaning?
Requires
mean and standard
deviation to determine position
What
about comparing scores from
different distribution?
Standardizat
Chapter 8
Introduction to Hypothesis
Testing
Introduction
When
you hear the word
hypothesis, what comes to mind?
Educated
guess
More specifically, proposed
explanation, outcome, or
prediction (typically based on
theory)
What
about hypothesis testing?
Proc