## Tropical Cyclone Counts Histogram

The student will analyze and interpret a histogram and evaluate the spread of the data. Students will compare it with a different visualization of the data to see how the two compare. Students will discuss the limitations of the two types of data displays and formulate questions to help them develop data literacy skills.They can create the histogram or use the one provided. This is part of the Tropical Cyclone Counts Graphing Bundle and can be completed independently or with the other activities in the bundle.

### Introduce and post the driving question:

Which data display is most useful for determining the risk of a tropical cyclone in a given area and preparing an effective emergency plan?

Tropical cyclones are sometimes called hurricanes or typhoons. The image is a model of the number of tropical cyclones around the world from 1842 – 2017. It was generated in the My NASA Data Earth System Data Explorer.

1. If students already completed the Tropical Cyclone Counts Box Plot or Tropical Cyclone Scatter Plot mini lesson, quickly review the patterns they identified, use the maps that were previously marked and continue to the Review Histograms section.
2. Tropical cyclones are sometimes called hurricanes or typhoons. The image is a model of the number of tropical cyclones around the world from 1842 – 2017. It was generated in the My NASA Data Earth System Data Explorer.

#### Think-Pair-Share

Examine the map at 120° West. What do you see at the different latitudes?

1. Circle the area on the map at 120° West with the most tropical cyclones.
2. Put a box around the areas on the map at 120° West between the equator and 40° North with the lowest number of tropical cyclones.
3. Describe the patterns you see

Have students share what they discussed.

#### Review Histograms

Option 1: Have students complete the Tropical Cyclone Create Histogram Activity to make a histogram using the data for the number of tropical cyclones at 120° West for each full degree of latitude from the equator to 40° North.

Option 2: Use the histogram provided for the number of tropical cyclones at 120° West for each full degree of latitude from the equator to forth degrees North.

A histogram is a type of graph which shows variability within a group.

The types of questions that might be answered with a histogram include:

How many states have populations in different ranges?

What is the pay for teachers in the state?

How many chocolate chips are in each of 100 bags of chocolate chips?

What do these questions have in common?

#### Question Set 1

1. What does the histogram show?
2. What is the overall distribution of the histogram?
3. What does the shape of the distribution tell you?
4. What does it NOT show?

#### Question Set 2

How does the histogram relate to the map image?

1. The total number of tropical cyclones in the region are shown on each by ____.
2. Which shows the number of tropical cyclones at each latitude? __________.
3. The number of latitudes with 6-10 tropical cyclones can be seen on the ___.
4. The pattern on the map shows______, while the pattern on the histogram shows ______.
5. What kind of questions can you answer with a histogram?
6. What do you wonder from the histogram?
7. Can you answer it with this graph, or do you need to see the data in a different way?

Have students share their answers to Question Set 2.

#### Exit Ticket

Have students prepare an exit ticket to write a caption for the histogram using the I2 technique?

• What I see…
• What it means…
• Write a caption for the histogram.

Collect exit tickets.