# EPSY 5601 Summer Second Test Study Guide

Study Guide for Second Test

You will need to use Excel to calculate mean, mode, median, and standard deviation. You will also need the t test spreadsheet, the

35 Questions — 36 points possible (raw score)

Normal Curve and Standardized Scores (9 questions)
Calculate the mean, mode, median, and standard deviation (sample and population) using Excel
Calculate standardized scores (z and IQ)
Understand the characteristics of the normal curve
Calculate the area under the normal curve (use Area Under the Normal Curve website)

Sampling (8 questions)
Understand the importance, bias, and steps in sampling

Identify simple random, stratified random, systematic, and cluster random sampling
Use a random number table
Determine sample size (use Sample Size Calculator website)
Determine confidence interval (use Sample Size Calculator website)

Internal and External Validity (3 questions)
Understand the relationship between internal and external validity and generalization
Identify threats to internal and external validity

Group Comparison Designs (3 questions)
Identify R O X O designs
Know the difference between true experimental, quasi-experimental (match-only, counterbalanced, and time-series), and causal-comparative (ex post facto) study designs

t-tests (5 questions)
Write the null, alternative, and research answer for a t test
Run a t test and know whether to read the equal or unequal variance t test
Understand how mean differences, standard deviations, and sample sizes influence p
Identify independent and dependent variables
Interpret the results of a mean table for a t test

Types of Stats (3 questions)
Identify paired t test, independent t test, chi-square, ANOVA, correlation, SEM, and HLM test results

Variables (2 questions)
Identify independent and dependent variables

Survey Research (2 questions)
Cross-sectional, longitudinal (panel, cohort, trend)