Mean, Median, Mode, and, and Range

By: Jacob Fowler and Cassie Gallman

Mean

• Mean is an average found by using division. The items in data set are added together, and then the sum is divided by the numbers of items.

• Step 1: Add all the numbers together.• Step 2: Then divide the sum by how many

numbers there are.• Step 3: Then you will get your answer.

EX. 3,4,7,1,6

1. 3+4+7+1+6= 21

2. 21/5= 4.2

Median

• Median is the middle number in an ordered data set.

• Step 1: List the numbers from least to greatest or greatest to least.

• Step 2: Find the number in the middle.• Step 3: If there is no median find the mean of the

two middle numbers.• Ex. 1, 2, 3, 4, 5, 6

3 is your Median

Mode

• Mode is the number that occurs most often in a data set.

• Step 1: Look at the numbers, look to see if any occur more than once.

• Step 3: Then that number is your Mode.• EX. 2, 3, 7, 4, 7

7 is your Mode

Range

• Range is the difference between the highest number and the lowest number.

• Step 1: You put the numbers in order from least to greatest.

• Step 2: You subtract the littlest number from the biggest number. That is your Range.

• Ex. 3, 2, 4, 7, 10

1. 3, 2, 4, 7, 10

2. 10 – 2= 8

Box and Whisker Plot

• Median and range is also used in box and whisker plots.

Box And Whisker Plot

• In a box and whisker plot the MEDIAN is used to find the number in the middle of the box and whisker plot.

• In a box and whisker plot, RANGE is used to find the difference between the highest and lowest number of the box and whisker plot.

THANK YOU!!!!!

• That is Mean, Median, Mode, and range and how you use them.

• These are some of sites you can use.• Brain Pop, Regentsprep.org,

Purplemath.com.