What does standard deviation measure? What is its relation to variance, and why is it useful?
What will be an ideal response?
Ans: Varies.
Standard deviation is a measure of a distribution’s variability and it tells us the average deviation of each case from the mean. It is calculated as the square root of variance. The standard deviation is useful because it tells us how much variation or spread there is in a given set of scores. Also, standard deviations allow us to evaluate how far any given score is from the mean in terms of standard deviations, which tell us the relative standing of that score compared to others in the distribution.
You might also like to view...
Research findings from Atchley (1989) report that "positive retirement" has four conditions, including
A. the retiree having children to help support him or her B. work not being the most important part of the individual's life C. good financial situation D. work not being the most important part of the individual's life AND good financial situation
Ostrow, Jones, and Spiker's (1981) study on the effects of age and societal expectations reports that
A. blatant age barriers exist about active participation in adulthood B. stereotyping based on age does not include adult participation in sport C. norms and expectations for older adults are the same for those entering adulthood D. gender stereotyping is much more severe than age stereotyping