algebra
posted by Sharon .
Describe the measures of central tendency and measures of dispersion for the following data set:
A = {8,1,2,9,3,2,8,1,2}

I will not find the values for you, but here is how you can get them.
For the mean, add all the scores and divided by the number of scores.
μ = ΣX/N
The mode is the most frequently occurring score.
For the median, first you must arrange the scores in order of their value. The middlemost score is the median.
The range is the highest score minus the lowest.
This should help you with the standard deviation:
http://www.easycalculation.com/statistics/learnstandarddeviation.php
I hope this helps. Thanks for asking.