AP PSYCHOLOGY

Detailed explanation-1: -Standard deviation is the spread of a group of numbers from the mean. The variance measures the average degree to which each point differs from the mean. While standard deviation is the square root of the variance, variance is the average of all data points within a group.

Detailed explanation-2: -Standard deviation-a measure of the average of how much scores in a distribution differ from the mean.-standard deviation is calculated by taking the positive square root of the variance. This gets rid of the units squared issue that makes variance hard to interpret.

Detailed explanation-3: -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.

Detailed explanation-4: -The standard error of the mean is the standard deviation of the sampling distribution of the mean.

Detailed explanation-5: -The standard deviation is a statistic that measures the dispersion of a data set relative to its mean. It is used to determine the spread of values in a single data set rather than to compare different units.