Mean, Mode, Median

Mean, Mode, Median

What is Mean?

• The mean is the average of a group of numbers. To find the mean, you add all quantities together and divide by the number of quantities

• Ex.: Amy wants to find our her average grade. Amy's test scores are 91, 84, 56, 90, 70, 65, 90, 30, and 92. What is the mean?

• Step 1: 91+84+56+90+70+65+90+92+30= 668

• Step 2: 668/9= 74.2

What is Mode?

• The mode is the most frequent value in a set of data.

• Ex.: Amy wants to find our her average grade. Amy's test scores are 91, 84, 56, 90, 70, 65, 90, 30, and 92. What is the mode?

• Amy's mode would be 90. (the number seen the most)

What is Median?

• The median is another word for average. Median represents the middle number(s) when ordered.

• Ex.: Amy wants to find our her average grade. Amy's test scores are 91, 84, 56, 90, 70, 65, 90, 30, and 92. What is the median?

• Step 1: Place numbers in order. 30 56 65 70 84 90 90 91 92

• Step 2: Check set to see what number(s) is in the middle. 84

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