what is mathimatical mean,median,mode and range?

Question

i dont have any notes and its semester exams (8th grade middle school) and i need accurate answers please but not to complicated.

Answer 1

In any set of numbers, the mean is what you get when you add up all the number and divide by how many number there are. Median is the middle number, when you put them all in ascending order, if there is an even number of numbers, take the two middle ones and find the mean of those two. Mode is the number occuring most frequently. Range is the largest number, minus the smallest number.

Ex. in the set {4, 7, 7, 10, 15} the range is 9, the mode is 7, the median is 7, and the mean is 8.6

Answer 2

The mean of the data set is its average.

To find the mean you add up all the numbers and divide the answer by how many numbers you have.

Try it! Add (1, 2, 3, 4, 5) on the calculator and then divide the answer by 5. (The / key means divide.)

The Median is the number which is in the exact middle of the data set.

In this sample set (1, 2, 3, 4, 5), 3 is the number which is exactly in the middle, so 3 is the median of this set.

The Mode is the number that appears the most often if you are working with only one variable.

We are working with one variable, a set of numbers. To show how to figure out the mode, we need to change our sample set because each number only appears once in it.

THE NEW SAMPLE SET: (2, 4, 4, 6, 8, 10).

4 appears more than any other number in this set so 4 is the mode of the set.

The range of the data set is the difference between the largest and smallest number in the set.

To find the range, you simply subtract the smallest number from the largest number in the set.

In this sample data set the largest number is 5 and the smallest number is 1.

(1, 2, 3, 4, 5)

5 - 1 = 4

The range of this set is 4.

I hope that clears things up for you.

Answer 3

mean is the average of the numbers. add them up and divide by how many numbers you used. median is, when all the numbers are put in order, it is the middle number. so the median of 5 7 9 20 21 is 9 because it is the middle number. if there are an even number of #'s you add up the 2 middle numbers and divide by 2. so if they are 6 8 10 11, you do 8+10 which is 18 then divide it by 2 and its 9. range is just the largest number minus the smallest number. finally, mode is the number that appears the most out of all the number. so if the #'s are 9 8 10 8 9 9, the mode is 9 because it appears the most.

Answer 4

If you consider all the kids in your class and the score each one gets on a test:

Mean is the average score - add up all the scores and divide by the number of students.

Mode is the score that occurs most often - maybe 12 people score 73.

The median is the score that is right in the middle of all the scores. For example, if you consider five scores, arranged from lowest to highest - 63, 68, 74, 81 and 89, then 74 is the median.

For the five scores above the range is 63 to 89, so the range is 26.

I hope this helps.

Answer 5

Mean the average mode most often median middle number when there lined up the great es to the least and range subtract the smallest number from the least

Answer 6

mean: When you add up all the numbers & divide by the amount of numbers.

median: Put all the numbers in least to greatest & find the middle number

mode: The MOST accuring number

range: Subtract the greatest & lowest number

Answer 7

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