Histograms

What is going to be the next interval he writes?

• 41-50

• 40-49

• 40-50

• 39-49

Looking at the data and not the table, what is the range of this data? (highest # - lowest #)

• 69

• 62

• 1-62

The y-axis represents the frequency, or numbers of people, in each bucket. 

When creating and numbering the scale of the y-axis, what would be a good number to go up to?

Each bucket will result in a bar being drawn.  How many bars will end up being drawn?

How many people at the restaurant were below the age of 30?

• 1

• 5

• 14

Notice that the bars are touching each other.  This is one difference between a bar graph (where the bars don't touch) and a histogram.  

What do you notice is another difference between a bar graph and a histogram?

True or False: By looking only at the histogram, you can tell the exact ages of all of the restaurant customers.

• True

• False

Are there more young people or old people that go to this restaurant?

There are 2 things that he forgot to do with completing this Histogram (that you've learned with all of the graphs we've made in class). 

Name 1 (or both) important things that are missing.

Graphs visually have different shapes.  The 3 most common shapes are:

1. Approximately Symmetrical - looks like a mirror image of data on either side of the graph

2. Skewed Left - little to no data on left

3. Skewed Right - little to no data on the right

What's the shape of this Histogram?

• Approximately Symmetrical - looks like a mirror image of data on either side of the graph

• Skewed Left - little to no data on left

• Skewed Right - little to no data on the right