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Statistics for Kids

by Ryan Semerau

Ages 7-12MathematicsStatistics

The second book in the Probability and Statistics for Kids series. Teaches statistics from the ground up - types of data, collection methods, sampling and bias, organizing and graphing data, mean/median/mode, spread, the normal distribution, correlation, experiments, significance, and how to spot misleading statistics. Real-world examples from school, sports, medicine, and everyday life.

16 chapters · 76 lessons · first 6 free

IntroductionFree

1 · Getting Started with Data

1.1 · What Is StatisticsFree
1.2 · Data Is EverywhereFree
1.3 · Descriptive vs Inferential StatisticsFree
1.4 · Why Statistics MattersFree
Chapter 1 TestFree

2 · Types of Data

2.1 · Categorical DataFree
2.2 · Numerical Data🔒
2.3 · Discrete vs Continuous Data🔒
2.4 · Choosing the Right Type🔒
Chapter 2 Test🔒

3 · Collecting Data

3.1 · Observation🔒
3.2 · Surveys and Questionnaires🔒
3.3 · Experiments🔒
3.4 · Censuses and Why Collection Matters🔒
Chapter 3 Test🔒

4 · Sampling and Bias

4.1 · Populations and Samples🔒
4.2 · Random Sampling🔒
4.3 · Bias: When Samples Go Wrong🔒
4.4 · Sample Size🔒
Chapter 4 Test🔒

5 · Organizing Data

5.1 · Frequency Tables🔒
5.2 · Grouping Data🔒
5.3 · Sorting and Rank Order🔒
5.4 · Two-Way Tables🔒
Chapter 5 Test🔒

6 · Graphs and Charts

6.1 · Bar Charts🔒
6.2 · Line Graphs🔒
6.3 · Pie Charts and Histograms🔒
6.4 · Choosing the Right Graph🔒
Chapter 6 Test🔒

7 · Center - Mean, Median, and Mode

7.1 · The Mean (Average)🔒
7.2 · The Median (Middle Value)🔒
7.3 · The Mode (Most Frequent)🔒
7.4 · When Mean, Median, and Mode Disagree🔒
Chapter 7 Test🔒

8 · Spread - Range, Variance, and Standard Deviation

8.1 · Center Is Not the Whole Story🔒
8.2 · Range🔒
8.3 · Interquartile Range (IQR)🔒
8.4 · Standard Deviation🔒
Chapter 8 Test🔒

9 · The Normal Distribution

9.1 · The Bell Curve🔒
9.2 · The 68-95-99.7 Rule🔒
9.3 · What "Normal" Really Means🔒
9.4 · Percentiles and the Bell Curve🔒
Chapter 9 Test🔒

10 · Correlation

10.1 · Scatter Plots🔒
10.2 · Positive and Negative Correlation🔒
10.3 · Strength of Correlation🔒
10.4 · Correlation Is Not Causation🔒
Chapter 10 Test🔒

11 · Misleading Statistics

11.1 · Misleading Graphs🔒
11.2 · Cherry-Picking Data🔒
11.3 · Missing Context🔒
11.4 · Loaded Survey Questions🔒
Chapter 11 Test🔒

12 · Experiments and Causation

12.1 · The Problem with Observation🔒
12.2 · Control Groups🔒
12.3 · Variables and Random Assignment🔒
12.4 · Confounders🔒
Chapter 12 Test🔒

13 · Statistical Significance

13.1 · Could It Just Be Chance🔒
13.2 · What "Significant" Means in Statistics🔒
13.3 · The P-Value (Intuitive Version)🔒
13.4 · Replication: The Real Test🔒
Chapter 13 Test🔒

14 · Statistics in the Real World

14.1 · Polls and Elections🔒
14.2 · Sports Statistics🔒
14.3 · Medical Studies🔒
14.4 · How Statistics Are Reported🔒
Chapter 14 Test🔒

15 · Thinking with Data

15.1 · The Statistical Toolkit🔒
15.2 · Asking Good Questions🔒
15.3 · Healthy Skepticism🔒
15.4 · What You Know Now🔒
Chapter 15 Test🔒

What you'll learn

✓What statistics is and why it matters
✓The difference between categorical and numerical data
✓How to collect data through observation, surveys, and experiments
✓What sampling and bias are and why they matter
✓How to organize data with frequency tables and two-way tables
✓How to choose and read the right graph for your data
✓How to calculate and compare mean, median, and mode
✓What spread is and how to measure it with range, IQR, and standard deviation
✓What the normal distribution is and how to use the 68-95-99.7 rule
✓What correlation is and why it is not the same as causation
✓How to spot misleading graphs, cherry-picked data, and loaded questions
✓How experiments establish causation using control groups and random assignment
✓What statistical significance means and why replication matters
✓How to evaluate polls, medical studies, and statistics in the news

How to use this workbook

15 chapters, designed for one chapter per week (4 short lessons per week plus a chapter test). Each lesson takes about 15-20 minutes - read the lesson, talk it over with the AI tutor, then answer a few short questions in your own words.

Prerequisites

Basic arithmetic (addition, subtraction, multiplication, division). Probability for Kids (Book 1 in this series) is recommended, as statistics builds on probability concepts like chance, distributions, and the law of large numbers. Fractions and percentages are used throughout.