Presenting Data Charts and graphs Bikes sold from 20/8/05 until 27/8/05 NameColorPriceGears RangerSilver$1405 OutdoorRed$19510 TourerBlue$18915 StarburstSilver$21515.

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Presentation transcript:

Presenting Data Charts and graphs

Bikes sold from 20/8/05 until 27/8/05 NameColorPriceGears RangerSilver$1405 OutdoorRed$19510 TourerBlue$18915 StarburstSilver$21515 MountainWhite$1295 Data can be organized with a table

What is the coldest month? What is the warmest month? What is the average temperature in July? What month has an average temperature of 1?

Every good table should have A title labeled rows and/or columns Although tables are good, charts and graphs are easier to understand.

Strengths/weakness of tables It is easier to find information It is easier to find patterns after the information is organized It is not easy to see big/small data Lots of data can still overwhelm the reader with numbers

Pictographs A pictograph is a symbol that represents an object or a concept.

What is the meaning of these pictographs?

A pictograph is also a type of chart. It uses symbols instead of numbers.

Pictographs can show lots of information

A good pictograph has a title pictures that “make sense” pictures that are the same size pictures that are lined up a scale (key) labeled axes What’s wrong with the pictographs?

What’s wrong with this pictograph?!?

What’s wrong with this pictograph? Purchasing power of the Canadian dollar

Strengths/weaknesses of pictographs It’s easier to understand than just numbers You can quickly see important facts Pictographs are not accurate (fractional pictures) Pictures can distract you from the data Pictographs can be misleading (Canadian dollar)