Average Annual Salary of a Cosmetologist. As of 2008 the median salary for a cosmetologist in the United States was $11.13, which includes tips and commission. The lower 10th percentile earned on average $7.47 hourly, while the upper 90th percentile earned a median salary of $20.41 hourly.verage Annual Salary of a Cosmetologist. As of 2008 the median salary for a cosmetologist in the United States was $11.13, which includes tips and commission. The lower 10th percentile earned on average $7.47 hourly, while the upper 90th percentile earned a median salary of $20.41 hourly.
The median is the ((n + 1)/2)th item, where n is the number of values. For example, for the list {1, 2, 5, 7, 8}, we have n = 5, so the median is the ((5 + 1)/2)th item.
Best Answer: Mean is the same as average-add all the data and divide by the number of data entries you added eg 3+5+2+6+4=20divided by 5=4 is the mean. Median is the middle number of a series eg. 1 3 7 12 21 and 7 would be the median. Range is the difference between the smallest and greatest numbers eg.ean-to find the mean, you take all of the numbers and add them together. Then you take the sum and divide it by the # of data. Ex. 2+5+4+6= 17 17/4= 4.25 Median-to find the median, you put all of the numbers in order from least to greatest.