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Mean, Median, Mode, and Range

- By Michelle Ftacek

Daily Opener2-Minute Math

- Find the Average to each of the following

problems. - 1.) 25144859
- 2.) 75291532
- 3.) 79195682
- 4.) 46491099
- 5.) 35521989

2-Minute MathAnswers

- 1.) 25144859
- 1464 36.5
- 2.) 7529153220
- 1715 34.2
- 3.) 791958
- 1563 52

- 4.) 46491099
- 2044 51
- 5.) 3552198945
- 2405 48

Mean

- The mean is simply the average of all the items

in a sample. - To compute a sample mean, add up all the sample

values and divide by the size of the sample.

Example of Mean

- 73, 58, 67, 93, 33, 18, and 147.
- If you added up these values you would get a sum

of 489. - Divide that sum by 7 to get a mean of 69.9.

Median

- The median is the midpoint in a series of numbers
- Half the data values are above the median, and

half are below. - Make sure to first place the numbers in order

from least to greatest if they are not already in

order.

Median Example

- In the odd series 1, 12, 33, 4, 9
- Order the numbers first from least to greatest
- 1, 4, 9, 12, 33
- 9 is the median
- In the even series 1, 4, 10, 12, 33, 88
- These numbers are already in order
- 11 is the median (halfway between 10 and

12) - Note, the median is not necessarily the same as

the AVERAGE (or mean). For example, the median of

2, 6, 10, 22 and 40 is 10 but the average is 18.

Easy Median Method

- In a series 23, 14, 25, 17, 19, 2, 6
- 1.) Place numbers in order from least to greatest

vertically. - 2
- 6
- 14
- 17
- 19
- 23
- 25

Easy Method

- 2.) Cross out the numbers by crossing out the top

number then the bottom number then back to the

top and then back to the bottom and so on. - 2
- 6
- 14
- 17
- 19
- 23
- 25

Mode

- The mode is the value that occurs most frequently

in a given series of numbers. - For Example
- In the number series 2, 4, 5, 5, 5, 6, 7
- 5 is the mode
- In the number series 6, 13, 24, 13, 35, 13
- 13 is the mode
- There doesnt always have to be a mode.
- The series 2, 5, 7, 4, 8, 9 does not have a mode.

You would simply state there is no mode.

Range

- Range is simply the difference between the

highest number in a series and the lowest number

in a series. - For Example
- In the series 2, 5, 6, 8, 9, 11
- The range is 11-29
- Note Make sure the numbers are in order to be

sure you are getting the highest and lowest

number correct.

Turkey Farm Activity

- MATERIALS
- worksheet
- marker
- crayons
- 5 feathers for each student printed on

construction paper - scissors
- glue
- small paper plate
- Calculator (optional)

Turkey Farm Procedure

- 1.) Distribute a worksheet that has a story that

you make up - For example
- "Your group owns a turkey farm. The newly

elected President has chosen your farm to supply

them with 5 turkeys for their special

Thanksgiving dinner. Only the 5 heaviest turkeys

will be chosen." - George 25lbs
- Millie 22lbs
- lulu 24lbs
- kiki 30lbs
- chi chi 24lbs
- wonka 14lbs
- Kyle 23lbs
- boo 28lbs

Procedure (conti.)

- 2.) The students choose the 5 heaviest and find

the mean, median, mode, and range. - 3.) The students then construct a turkey using

the information and supplies given. - 4.) Paper plate is the body where the mean,

median, mode, and range are written - 5.) The feathers made from construction paper are

used to write the 5 weights of the turkeys on

each one in order from least to greatest. - 6.) The feathers are glued onto the paper plate,

a copy of a turkey head is given and colored, and

also attached to the plate - 7.) Any extra details are added.
- 8.) Then place them on a bulletin board that

reads, "Who let the turkeys out?"

For Next Class

- Finished Turkeys for bulletin board
- Will review on mean, median, mode and range.
- Maybe Pop Quiz

Other Activity Ideas

- http//www.theteacherscorner.net/lesson-plans/math

/miscellaneous/mean.htm - http//www.beaconlearningcenter.com/WebLessons/All

Data/default.htmpage6

Resources

- Turkey Farm Activity http//www.pacificnet.net/ma

ndel/math.html - http//wordnet.princeton.edu/perl/webwn
- www.gmhc.org/health/glossary3.html
- www.nmlites.org/standards/math/glossary.html
- Turkey head http//www.20ishparents.com/holiday/tc

olor1.shtml - Turkey Feathers http//www.kidsdomain.com/craft/ce

gif/pum-tur3-feath.gif