Measures of central tendency

Mean: Is the average of the numbers.

How to calculate the Mean:

Add the numbers then divide it by the quantity of numbers.

Example:

The mean of 5 , 3

5 + 3= 8

8 ÷ 2 = 4

Median: The middle number of a list of numbers.

How to calculate the median:

Arrange the numbers in order from least to highest and the middle number is the median.

Example:

The median of 4, 5, 8 , 9, 3

3, 4, 5, 8, 9.

The median is 5.

If the quantity of numbers is even, order them from least to highest, take the two middle numbers, add them and then divide it by 2.

Example:

1,4,2,6

1,2,4,6

2+4=6/2

The median is 3.

Mode: is the value that occurs most often.

How to calculate the mode

The mode is the number that is most repeated

Example:

1, 2, 6, 7, 6

6 is the mode.

If there are no repeats there is no mode.

Range:  is just the difference between the largest and smallest values.

How to calculate the range:

Substract the lowest value from the highest value.

Example:  

3, 9, 8, 7, 6

9 – 3 = 6

6 is the range.