Statistics & Data Analysis

Analyze data distributions, understand sampling methods, and interpret graphs.

7th Grade

Statistics

~45 min

🎮 Interactive Activity: Data Analyzer

Calculate statistical measures from data!

Data: [12, 15, 18, 15, 20, 15, 22]

🎮 Interactive Activity: Sampling Simulator

Understand population and sample sizes!

Population: 100
Sample: 20

1. Measures of Center

Mean, Median, and Mode

These measures describe the center of a data set in different ways.

Mean (Average): Sum ÷ Count

Example: Data = 8, 12, 10, 14, 16

Mean = (8 + 12 + 10 + 14 + 16) ÷ 5 = 60 ÷ 5 = 12

Median: Middle Value

Example: Data = 3, 7, 9, 11, 15

Ordered: 3, 7, 9, 11, 15. Median = 9 (middle value)

Mode: Most Frequent

Example: Data = 4, 6, 4, 8, 6, 4, 9

4 appears 3 times (most), so mode = 4

2. Measures of Variability

3. Sampling Methods

4. Data Displays

5. Problem-Solving Strategies

6. Real-World Applications

Frequently Asked Questions

Practice Time!

Practice Quiz

Questions

Correct

Score

What is the mean of 8, 12, 10, 14, 16?

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What is the median of 3, 7, 9, 11, 15?

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What is the mode of 4, 6, 4, 8, 6, 4, 9?

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What is the range of 25, 30, 18, 42, 35?

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What measures spread around the mean?

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If 6 values sum to 72, what is the mean?

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A box plot shows:

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What effect do outliers have on the mean?

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Interquartile range (IQR) is:

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Which graph best shows frequency distribution?

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