1. Warm up
Find the range, mean, median, mode, and outliers for the data: 16, 22, 19, ,17, 20, 18, 22, 15, 16, 14, 23

2. Warm up
Find the range, mean, median, mode, and outliers (if any) for the data: 16, 22, 19, ,17, 20, 18, 22, 15, 16, 14, 23 Range: 9 Mode: 90 and 100 Mean: Outliers: none Median: 18
14, 15, 16, 16, 17, 18, 19, 20, 22, 22, 23

3. Random sample
In a random sample, every person or item has an equal chance of being chosen.
Example 1:
George put some cards into a basket. Then, he drew 3 cards out of the basket. This is a random sample because every card has an equal chance of being picked

4. Random sample Example 2:
Jacob wanted to know what the most popular sneaker brand was of his classmates. His class had 30 students. To save time, he asked 10 boys the brand of sneakers that they were wearing. Of the students surveyed; Nike was the most popular sneaker brand. Explain 2 ways Jacob’s survey could have been more representative of his class’s favorite sneaker brand.

5. Random sample Example 2: (possible answers) Survey girls as well
Survey more students
Ask students all of the sneaker brands that they own (not just the ones they are wearing)

6. Random sample Example 3:
Michael is trying to determine the best location to have his pizza shop. There are 4 different districts in his city (business, garment, government, and harbor). Michael took a week to observe where people tend to gather in the business and harbor districts. Michael then decided to have his shop in the harbor district where he saw the most people gather. What changes to Michael’s technique would have gave him a better understanding of where his store would be most successful?

7. Random sample Example 3: (possible answers) Survey all 4 districts
See if people eat pizza in those areas.
Survey the people and see which district likes pizza the most.

8. Random sample Example 4:
Lewis is trying to determine the bus stop location that the most people get on the bus from. He surveys every third student coming off the bus. He asks them where they get on the bus. What would have been an improvement in Lewis research?
a. Ask all students what they had for breakfast.
b. Survey all students on the bus.
c. Ask students how long they have been riding the bus.

9. Random sample Example 4:
Lewis is trying to determine the bus stop location that the most people get on the bus from. He surveys every third student coming off the bus. He asks them where they get on the bus. What would have been an improvement in Lewis research?
a. Ask all students what they had for breakfast.
b. Survey all students on the bus.
c. Ask students how long they have been riding the bus.
He only surveys every third student coming off the bus and asks them where they get on the bus. So he is not surveying even half of the students. To make it more valid, he has to survey all the students to know where the most popular bus stop is located.

10. Use the remainder of the class period to: complete the class work assignment on qualitative and quantitative data