Mean; medianMean, Median, Mode, and Range

Eddie Alvarez; Marco soto; chantz skaer; Mariela ramirez;anna perales

April 3,2012

Eddie Alvarez

Mean DefinitionThe "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.

Eddie Alvarez

How to find the MeanIt is easy to calculate: add up all the numbers, then divide by how many numbers there are.

Anna perales

The cost of a tank of gas at ninedifferent gas stations is shown below.What was the mean cost of a tank ofgas?Cost of Gas: $17, $18, $22, $15, $17,$16, $25, $21, and $20

25+22+21+20+18+17+17+16=1568 156= 19.4

Median definitionThe median number is the number that falls directly in the middle of the list.

Anna Perales

How to find the median

To find the median, the data should be organized into sequential order. The middle value in the sequence in the median, for example in the sequence 3,6,9, 6 would be the median.

Marco soto

3, 5, 7, 12, 13, 14, 21, 23, 23, 23, 23, 29, 39, 40, 56 .The median value of this set of numbers is 23.

Mode definitionThe "mode" is the value that occurs most often.

Marco Soto

How to find mode The number repeated most often. This list has two values that are repeated three times.

Chantz skaer

{8, 15, 19, 19, 28, 29, 35}19 appears twice, all the rest appear only once, so 19 is the mode

Kate seen 8 blue car, 15 red cars, 19 pink cars, 19 brown cars, 28 white cars, 29 green cars, and 35 black cars

Range definition

The "range" is just the difference between the largest and smallest values

Chantz skaer

How to find the rangeJust order the data from least to greatest, find the lowest and highest numbers in that set, and then subtract the lowest number from the highest number.

Mariela Ramirez

13, 18, 13, 14, 13, 16, 14, 21, 13The mean is the usual average, so:(13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13) ÷ 9 = 15

Referenceshttp://www.mathsisfun.com/mean.html

http://www.ask.com/web?q=what+is+median+in+math&qsrc=178&o=0&l=dir

http://www.ask.com/web?qsrc=1&o=0&l=dir&q=how+to+find+the+median&oo=0

http://www.purplemath.com/modules/meanmode.htm

http://www.purplemath.com/modules/meanmode.htm

http://www.purplemath.com/modules/meanmode.htm

http://www.ask.com/web?q=how+to+find+the+range&qsrc=0&o=0&l=dir&oo=0

Mariela Ramirez