How does the tendency of iron to rust depend on the pH of solution?

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 ● matters for descriptive stats ○ describes a facet of the entire distribution ○ visualize the distribution with central tendency and variability ○ how well a group of scores represents a distribution ● useful for inferential stats ○ how well an individual score represents an entire population ■ info on how much error we should expect if we use a sample to represent a population ● when the population variability is small, the scores are close together ○ any individual score or sample will likely be a good representation of the population ● when variability is large, the scores are not a good representation of the population ● selecting a participant from a distribution