What is the difference between mean and median? clearly state the difference.

The arithmetic mean is the average.

The median is the value that occupies the central position.

Step-by-step explanation:

The arithmetic mean is the average, it represents the equitable distribution, it can be the sample mean and the population means. It is the value that corresponds to the sum of all data divided by the number of data in the set.

The median is the value that occupies the central position of all the data ordered from least to greatest, if the number of data is even, the median is the arithmetic mean of the two exchanges.

For example, for the set of numbers 6,12, 20, 9 and 18, the average can be calculated by first counting the

6 + 12 + 20 + 9 + 18 = 65

Then divide this result 65 by 5 which is the number of numbers that make up the set and that you added to obtain it, which results in 13, which would be the average of this set of numbers.

65/5 = 13

For the median, they are ordered from least to greatest.

Once this is done, we take the number located in the middle and this will be the median.

Thus we would have the numbers 6, 9, 12, 18 and 20. In this case, the median is 12.

Now we add  number to be even, 1, 6, 9, 12, 18 and 20, in this case, the 2 numbers of the center are taken and averaged

9 + 12 = 21

21/2 = 10.5

c. 16 units

step-by-step explanation:

mark brainliest and have a great day!

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.