Sample Mean - mean of ungrouped or raw data

where:
= mean
Σx = sum of all the measurements
n = number of measurements

Example:
The Sales of Nena’s Sari-Sari Store for one week.

Day	Sales
Sunday	PhP 750
Monday	PhP 1,257
Tuesday	PhP 1,102
Wednesday	PhP 954
Thursday	PhP 845
Friday	PhP 978
Saturday	PhP 1,005

To get the mean (or average) sales for the week, we add all the sales figures for each day (x), and divide it by the number of days (n).

This entry was posted on Saturday, June 10th, 2006 at 11:27 pm and is filed under 4: Measures of Central Tendency. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.