AP PSYCHOLOGY

Detailed explanation-1: -Standard deviation (SD) is the most commonly used measure of dispersion. It is a measure of spread of data about the mean. SD is the square root of sum of squared deviation from the mean divided by the number of observations. This formula is a definitional one and for calculations, an easier formula is used.

Detailed explanation-2: -In statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values.

Detailed explanation-3: -Measures of Dispersion or Variability Measures of dispersion describe the spread of the data. They include the range, interquartile range, standard deviation and variance.

Detailed explanation-4: -Definition: Standard deviation is the measure of dispersion of a set of data from its mean. It measures the absolute variability of a distribution; the higher the dispersion or variability, the greater is the standard deviation and greater will be the magnitude of the deviation of the value from their mean.

Detailed explanation-5: -A standard deviation (or ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.