Exploring Data: Real-Life Stats Together

Exploring Data: Stats 

What is a Statistical Investigation?

A systematic way to answer questions using data Helps us make sense of the world around us Used everywhere: sports, weather, school surveys, social media Involves collecting, organizing, and analyzing information

The Statistical Investigation Cycle

Let's Pose Our Investigation Question!

Brainstorm questions about our class Choose something we can measure with numbers Examples: How many pets do we have? Hours spent on homework? Make it interesting and relevant to us!

Planning Our Data Collection

Who will we collect data from? (Our class) How will we ask the question clearly? What units will we use? (hours, numbers, etc.) Privacy and respect - participation is voluntary

Data Collection Time!

Move around and collect data from classmates Record answers accurately in your table Double-check for any unusual or impossible values Be respectful and patient with each other

Organizing Our Data

Create a frequency table to count responses Use tally marks to keep track Order our data from smallest to largest Look for patterns - what do you notice?

Creating Data Visualizations

Dot plots: Each dot represents one person's response Bar graphs: Height shows how many people gave each answer Choose the best graph for our data type Make it clear and easy to read

Calculating Measures of Centre and Spread

{"left":"Mean: Add all values ÷ number of values\nMedian: Middle value when ordered","right":"Mode: Most frequent value\nRange: Highest value - Lowest value"}

What Do Our Results Tell Us?

Look at your calculations and graphs What patterns do you see in our class data? How do these numbers answer our original question? What surprised you about the results?