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# Data: Measures of Central Tendencies - PowerPoint PPT Presentation

Data: Measures of Central Tendencies. Mean Median Mode Range. Using linker cubes, make a bar graph to represent the price of the toys below. Car \$5. Doll \$12. Game \$7. Football \$8. Jump Ropes \$3. Top \$1. Doll \$12. Football \$8. Game \$7. Car \$5. Jump Ropes \$3. Top \$1.

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Presentation Transcript

• Mean

• Median

• Mode

• Range

Using linker cubes, make a bar graph to represent the price of the toys below.

Car

\$5

Doll

\$12

Game

\$7

Football

\$8

Jump Ropes

\$3

Top

\$1

Doll of the toys below.

\$12

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

Leveling the Bars

Mean Leveling Calculation of the toys below.

Doll

\$12

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

Doll of the toys below.

\$12

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

How do we find Median?

Median: The middle value in an ordered set of data, or the mean of the two middle numbers

Doll of the toys below.

\$12

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

How do we create an ordered set?

How do we find Median? of the toys below.

Median: The middle value in an ordered set of data, or the mean of the two middle numbers

Doll

\$12

Median = ?

6

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

Mode of the toys below.

What is the mode?

NO MODE

\$5

Doll

\$12

Football

\$8

Game

\$7

Marbles

\$5

Car

\$5

Jump Ropes

\$3

Top

\$1

Range of the toys below.

What is the range?

The difference in the highest and the lowest values.

Doll

\$12

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

Top of the toys below.

\$1

Range

What is the range?

The difference in the highest and the lowest values.

Doll

\$12

Difference (Range) = 11

Circle Graphs of the toys below.

Circle Graphs

Circle Graphs

A child received money as a gift from grandparents. The money was used to buy one of each of these toys.

Use linker cubes to make a bar graph, letting a different color represent the cost of each toy.

Doll

\$12

Car

\$5

Game

\$7

Football

\$8

Jump Rope

\$3

Top

\$1

Doll The money was used to buy one of each of these toys.

\$12

Football

\$8

Game

\$7

Car

\$5

Jump Ropes

\$3

Top

\$1

Which one costs the most?_________The least? _________

At this point, is it easy to see the percent of the total money that each toy represents? _______

What does PERCENT mean? ________________

Doll The money was used to buy one of each of these toys.

\$12

Jump Ropes

\$3

Car

\$5

Game

\$7

Top

\$1

Football

\$8

Put all the stacks into one long tower.

Transfer this representation to graph paper and color in the blocks.

What kind of graph shows things in percentages? The money was used to buy one of each of these toys.

Cut out the strip of colored graph paper.

Circle it around and tape the ends together. Do NOT overlap the ends!

Put this on top of a piece of dot paper. Make sure the center of the circle is exactly on one of the cross bars. Put a bold dot at the center.

Draw off the sections for each color.

Identify the degreee of each section.

State the percent of the total cost for each toy.

8/36 = 2/9

80o

22.2%