Question

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}

Answer 1

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 middle-most 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/learn-standard-deviation.php

I hope this helps. Thanks for asking.