Chapter 7 Review
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
Proportion (or fraction)
of all possible outcomes
Probability of X = # of outcomes
classified as X / Total # of possible
Example: Jar of marbles
Fractions, decimals, or percentages
PSY 2073 Statistics for Psychology
Exam 2 Study Guide
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
Be able to
Probability and Samples: The
Distribution of Sample Means
Populations & Samples
Z-score of sample
of many samples, how do we
tell which sample is a better
representation of the population?
Z-Scores: Location of Scores and
an individual score have
mean and standard
deviation to determine position
about comparing scores from
Introduction to Hypothesis
you hear the word
hypothesis, what comes to mind?
More specifically, proposed
explanation, outcome, or
prediction (typically based on
about hypothesis testing?