to find the mean of a set of numbers you have to find the total sum of the data divided by the number of addends in the data.
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The mean is the average of the set of numbers. To find it you have to add up all of the numbers in the set and divide by however many numbers there are in the set. For example, if you had the set: 1, 2, 3, then you would add them up to get 6. Since there are 3 numbers you would divide by 3 to get 2. The range is the highest number in the set minus the lowest number in the set. Example: of you have the set: 1, 2, 3, 4, 5, 6, 7, 8, then the range would be 8-1, or 7.
One set of numbers for which this is true is {8}.
a data set in this case can be any collection of numbers you choose. Say we define Set A = {1,2,3,4,5} The Median for Set A is 3. The mean is the sum of the numbers divided by 5 in this case. 15/5 = 3 is the mean of Set A.
The mean and the median are both involved with a set of numbers. The mean refers to the average of the numbers. The median refers to the middle number of the numbers
to find the median in a set of numbers you have to order them from the smallest to the largest and find the middle value e.g. 2,4,3,7,1 1,2,3,4,7 the median is 3