Measures of Distribution :
Measures of Distribution Normal Distribution Characteristics:
Mean = Median = Mode
Skewness = 0
Kurtosis = 0 Next Slide
Skewness :
Skewness “Distributional Shape and the Blind Date” Sum of all of the Z-scores cubed Number of people in the study Skewness = 0, distribution is symmetrical
< 0, negatively skewed
> 0, positively skewed Next Slide
Skewness :
Skewness Next Slide
Many Forms of Skewness :
Many Forms of Skewness Next Slide
Kurtosis and the Blind Date :
Kurtosis and the Blind Date Kurtosis is the ratio of height to width relative to the normal curve Next Slide
Kurtosis :
Kurtosis Sum of all of the Z-scores to the fourth power Number of people in the study Next Slide
Kurtosis :
Kurtosis Next Slide
Infinite Number of Normal Distributions :
Infinite Number of Normal Distributions Next Slide
Unit 1: Background to Inferential Statistics :
Unit 1: Background to Inferential Statistics Lesson 5: Measures of Distribution EDER 6010: Statistics for Educational Research
Dr. J. Kyle Roberts
University of North Texas