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What is Statistics ?

What is Statistics ?. Def : Statistics is the practice or science of collecting and analyzing numerical data in large quantities. Ch. 2- Graphs: Categorical Variables. Different Types of Graphs for Categorical Variables:. *Pie Chart *Bar Graph *Line Graph *Pictograms. Definition:.

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What is Statistics ?

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  1. What is Statistics? Def: Statistics is the practice or science of collecting and analyzing numerical data in large quantities.

  2. Ch. 2- Graphs: Categorical Variables

  3. Different Types of Graphs for Categorical Variables: *Pie Chart *Bar Graph *Line Graph *Pictograms

  4. Definition: A Distribution of a variable tells us what values it takes and how often it takes these values.

  5. Bar Graphs Ex 1: Let’s make a bar graph out of the Eye Color distribution in the Class:

  6. Bar Graphs Should Be Clearly Labeled Mo v i e s $ (in millions) 0 5 10 15 20 25 30 35

  7. Pie Charts A pie chart must be whole, so the variables must add to 100% of the population Pie chart distribution of the toppings on a pizza.

  8. Line Graphs $ Time (years) A Line Grahof a variable plots each observation against the time at which it was measured.

  9. Pictograms Pictograms often can be misleading or biased.

  10. Graphs should also Be Clear in Their Presentation

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