The PURPOSE of Unit 5 is to review basic concepts of statistical analysis so that you can critique the results of studies that you read. The chapters for this unit have much detail in the area of statistical analysis. You will be using a decision-making map to guide selection of the specific statistics that best fit a research question or hypothesis. Also, the analytical concepts for qualitative research are important for you to understand.

The following TERMS are essential for you to know.

• Central Tendency -- mean, median, mode
• Dispersion -- standard deviation, range
• Distribution--skewed, bimodal, normal
• Types of statistics--parametric, non-parametric, descriptive, and inferential
• Confidence intervals 
• Level of significance
• Type I and Type II error
• Power analysis
• Univariate statistical procedures--frequency, percent, mean, median, mode, histogram, frequency polygon 
• Bi-variate statistical procedures--correlation, scatter plot, Chi square, contingency tables
• Group comparisons--t-test, analysis of variance, chi-square, Mann-Whitney U, Wilcoxin Signed-rank test, Kruskal-Wallis test, Friedman test
• Advanced statistical analyses--multivariate analysis of variance, multiple regression, factor analysis, structural equation modeling
• Qualitative data analysis--auditing, bracketing, coding, content analysis, critical incident, patterns and themes
• Findings
• Results--mixed, negative, positive, non-significant, significant, predicted, serendipitous, unexpected
• Conclusions
• Implications
• Types of interpretation--clinical significance, statistical significance, causality, association