# Sample Size/Sound Conclusions

8-10 yrs old

11-13 yrs old

Geography

Math & Economics

Science

Students will draw conclusions about the composition of a region by taking "core samples." How does the size of the sample affect its reliability?

Submitted By: Jordan Ullman

July 12, 2018

#### Skills

• Collaboration
• Communication
• Critical Thinking

#### Supporting Files

Core Sample Presentation Template

Students can use this PowerPoint template to present their findings.

Core Sample Excel Template

Students or teacher can use this Excel worksheet to automatically generate circle graphs that represent their samples.

Sample Size and Sound Conclusion World

### Learning Objectives

• Build and support hypotheses
• Construct plots to visually represent data
• Understand relationship between sample size and reliability
• Review conversion between fractions and percents

### Guiding Ideas

• How can we determine the composition of a large portion of the Minecraft world?
• How does the size of a sample affect the reliability of the conclusions you can draw from it?

### Student Activities

1. Upon spawning into the world, students will acquire a writeable book from one of the chests. On a journal page, they need to answer the question, "How many Minecraft blocks are contained in a 50x50x50 region?"
2. Once the question is answered, students will teleport to the region they will study. They will make a prediction regarding the composition of the region. They will then take a pickaxe from one of the chests in the region. It should be enchanted with Silk Touch, so blocks will maintain their original form.
3. Students stand at a random spot in the region, and dig straight down. This is usually a Minecraft "no-no," but they will be OK in this instance. After digging down 50 blocks, they will drop into an underground chamber.
4. Have students check their inventories. They should have 50 blocks. If not, they can access one of the trapped chests in this area to take as many glass blocks as it takes to get to 50. The glass will be a stand-in for air.
5. Students will move to one of the teleport stations around the perimeter of the room, which will teleport them to a different region of the map.
6. In this area, first they should interact with the "Helper" NPC, who will give them a camera, give them fly ability, and also eliminate fall damage. Next, students will build adjacent 1x1 towers from each of the materials they collected (e.g. one tower of dirt, one of stone, one of gravel, etc). Use the camera to photograph their plot.
7. Once their plot is complete, they will talk to a "Survey Taker" where they will input their results into a form. The entire class's data can be collected and presented on a circle graph. Students can compare their 50-block sample with the one created from samples from the entire class.

### Performance Expectations

• Students will be able to correctly convert an amount out of 50 blocks into the appropriate percentage.
• Students will be able to determine that the larger the sample, the more reliable the results are.
• Students will complete a document using the information they collected in their journals.

#### Skills

• Collaboration
• Communication
• Critical Thinking

#### Supporting Files

Core Sample Presentation Template

Students can use this PowerPoint template to present their findings.

Core Sample Excel Template

Students or teacher can use this Excel worksheet to automatically generate circle graphs that represent their samples.

Sample Size and Sound Conclusion World