Chapter 5 - Measures of Dispersion

Question 1

Index of Dispersion

Answer 1

Used to analyze dispersion of nominal level data and varies between 0 and 1

Question 2

Range

Answer 2

(H-L) used to analyze dispersion of ordinal or higher data and is the distance between the highest and lowest scores in a distribution

Question 3

Variance

Answer 3

The mean of the squared deviations from the mean

Question 4

Standard deviation

Answer 4

The square root of the variance

Question 5

Sum of Squares

Answer 5

The endpoint of the process involved in calculation the variance and standard deviation. First, you determine the distance between each score and the mean of distribution you then square these deviation scores, multiply them by f, and sum these scores to arrive at the sum of squares.