Does the check digit of an ISSN detect every single error in an ISSN? Justify your answer with either a proof or a counterexample.

PSYCH STATS POWERPOINT 4 ● Variability: how scores are spread out in a distribution ○ more scores, greater variability ○ a lot of deviation and different values ○ a measure of how spread out or close together a set of scores are within a distribution ○ refers to the distance between scores ○ can also refer to individual scores ■ how far away from the mean is a certain score ○ small, large, or none ○ how accurate an individual score or sample represents the entire population ○ if a score is equal to the mean, there is no variability ○ if a score does not equal the mean, we can determine the amount of variability that exists ● matter