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## Statistics and probability

### Unit 1: Lesson 1

Analyzing one categorical variable- Identifying individuals, variables and categorical variables in a data set
- Individuals, variables, and categorical & quantitative data
- Reading pictographs
- Read picture graphs (multi-step problems)
- Reading bar graphs
- Reading bar graphs: Harry Potter
- Creating a bar graph
- Create bar graphs
- Reading bar charts: comparing two sets of data
- Read bar graphs (2-step problems)
- Reading bar charts: putting it together with central tendency
- Reading pie graphs (circle graphs)
- Picture graphs (pictographs) review
- Bar graphs review

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# Reading bar graphs: Harry Potter

Sal interprets a bar graph. Created by Sal Khan.

## Video transcript

At Hogwarts, there are
four houses-- Gryffindor, Hufflepuff, Ravenclaw,
and Slytherin. The bar chart below shows
the number of house points that each house received today. How many house points
did Hufflepuff receive? So if we look at
this bar chart, we could assume that this column
right over here is Hufflepuff, because it's the
only one that starts with an H. This will be
Gryffindor, this is Ravenclaw, and this must be Slytherin. And so, if we look
at Hufflepuff's bar, it looks like they have
3 points scored today. So let's put 3 points. All right, let's try one more. So here they're saying,
how many house points did Slytherin receive? So this is going
to be Slytherin, and it looks like they
received 4 points.