Compare a Mean with Individual Values
Add the values and divide by the number of supplied values.
About 18 minutes, plus any extended practice
Open lesson 1Interpret Data Summaries and Privacy Tradeoffs
For values[1,2,9], calculate the mean and compare it with the median. Then assess a claim that deleting names from detailed unique rows guarantees anonymity.
Before you begin
- Add/divide numeric values and distinguish a record from a summary.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Find a Median after Ordering the Data
Sort the five values and select index 2 as the middle value.
About 18 minutes, plus any extended practice
Open lesson 2Recognize Aggregation and Remaining Risk
Separate the changed data representation from an unsupported anonymity claim.
About 18 minutes, plus any extended practice
Open lesson 3Keep a Data Question within Its Collection Scope
Check the source group, time and measure before generalizing or comparing.
About 18 minutes, plus any extended practice
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.
Topic references
- 2026 CSTA PK–12 Computer Science Standards: topic reference — Data & Analysis; Computing & Society
These references informed the topic selection. They do not certify complete standards alignment.