Data Detective Worksheet
Case File
Data Detective
Solve your case by collecting, organizing, and analyzing your own clues!
Name: ___________________________
Date: __________ Class: _____
Step 1: The Investigation Question
What statistical question are you investigating? (Example: "How many books did my classmates read last month?")
Q:
Step 2: The Clue Board (Raw Data)
Record your collected data points in the bubbles below (aim for 10 to 15 numbers):
1
2
3
4
5
6
7
8
9
10
11
12
Step 3: Analyze the Clues
1. Find the Mean (Average) Sum ÷ Count
Add all values together, then divide by the total number of values.
Show sum & division work here:
Sum: ___________ Mean Answer: ___________
2. Find the Median (Middle) Order & Cross
Line up numbers from least to greatest. Cross off from ends to find the middle!
Ordered list:
Median Answer: __________________
3. Find the Mode (Most) Most Frequent
Identify the number(s) that appear most often in your data set.
Tally duplicates:
Mode Answer: __________________
4. Find the Range (Spread) Max − Min
Subtract the lowest number from the highest number in your set.
Highest Value − Lowest Value = Range
______ − ______ = Range Answer: ______
Step 4: Visualize the Evidence
A. Frequency Table Group your clues
| Intervals/Categories | Tally Marks | Frequency |
|---|
| | |
| | |
| | |
| | |
| | |
B. Create Your Histogram Color the bars
Frequency (Count)
10 8 6 4 2 0
Intervals (Same as Table Categories)
Int 1
Int 2
Int 3
Int 4
Int 5
Case Closed Checklist:
Data Collected Math Complete Graph Drawn