Kinesiology 2032A/B Lecture Notes - Lecture 20: Statistical Inference, Descriptive Statistics, Scatter Plot

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2032A/B
• Professor: Lindsay Nagamatsu

Document Summary

Helps visualize and describe the relationship of the data. Graphs are more useful than using tables because it shows the relationship at a quick glance. The type of graph depends on the data. Bar graph: values on the x-axis are categorical (ie. nominal) Height of each bar= value of descriptive statistics for each group/condition. Line graph: values on the x-axis are continuous. Each point represents the various groups/conditions and the height of each point= value of descriptive statistics for that group/condition. *graphs measure the central tendency not individual scores (individual scores= not meaningful) Correlation coef cient: an index of how strongly 2 variables are related to each other. Pearson product-moment correlation coef cient (r): a type of correlation coef cient used with interval and ratio scale data indicates the strength of the relationship and the direction (positive or negative) The +/- describes the direction of the relationship.