Stat chapter 3

A graphic representation of the distribution of scores on a variable that includes the range, the median, and the interquartile range.

The difference between the 75th percentile and 25th percentile scores in a distribution.

The difference between the largest score and the smallest score of a distribution.

The difference between an individual score in a distribution and the mean for the distribution, squared.

The average deviation between the individual scores in the distribution and the mean for the distribution

The sum of each squared deviation for all of the cases in the sample.

The sum of the squared deviation divided by the number of cases in the population, or by the number of cases minus one in the sample.

The sample variance

the sample standard deviation

the population standard deviation

the population variance

The sum of squares, or sum of squared deviations