Year 9 in England
8th grade statistics and probability
7 8th grade statistics and probability skills, each with a worked example, free practice that checks every answer, and a printable worksheet. Start with a mixed review, or jump to the skill you need.
Mixed review
Ten questions drawn from every skill below.
Scatter graphs and correlation
CCSS 8.SP.A.1CCSS 8.SP.A.2CCSS 8.SP.A.3England: KS3 StatisticsEngland: GCSE Foundation Statistics
Two-way tables
CCSS 8.SP.A.4England: KS3 StatisticsEngland: GCSE Foundation Statistics
Example
A two-way table: Year 7 — cats 8, dogs 7; Year 8 — cats 9, dogs 18. How many students are in the table altogether?
- 8 + 7 + 9 + 18 = 42
Answer: 42
Describe association in scatter plots
CCSS 8.SP.A.1England: KS3 StatisticsEngland: GCSE Foundation Statistics
Example
What association would you expect between: Outside temperature and heating bill?
- Negative
Answer: Negative
Make predictions with a line of best fit
CCSS 8.SP.A.2CCSS 8.SP.A.3England: KS3 StatisticsEngland: GCSE Foundation Statistics
Example
The line of best fit for test score (y) against hours of practice (x) is y = 5x + 23. Predict the score after 6 hours.
- 5 × 6 + 23 = 53
Answer: 53
Interpret the slope and intercept of a line of best fit
CCSS 8.SP.A.3England: KS3 Statistics
Example
For plants, the line of best fit of height in cm (y) against age in weeks (x) is y = 5x + 20. What does 5 mean?
- Slope 5: about 5 cm more for each extra week.
Answer: Plants grow about 5 cm per week
Relative frequencies in two-way tables
CCSS 8.SP.A.4England: KS3 StatisticsEngland: GCSE Foundation Statistics
Example
Year 9 survey. Have a pet: 23 with a phone, 11 without. No pet: 16 with a phone, 20 without. Of the students WITH a phone, what fraction have a pet? Give a fraction in simplest form.
- 23 + 16 = 39
- 23/39
Answer: 23/39
Builds on: Two-way tables
Spot outliers and clusters in scatter plots
CCSS 8.SP.A.1England: KS3 StatisticsEngland: GCSE Foundation Statistics
Builds on: Describe association in scatter plots
Keep exploring
8th grade topic pages
More for 8th grade
Hands-on math tools
- Virtual fraction bars and fraction circles
- Interactive number line
- Virtual base ten blocks
- Multiplication arrays
- Interactive teaching clock
- Virtual money for counting practice
- Interactive coordinate plane
- Algebra balance scale
- Adding fractions with a model
- Virtual algebra tiles
- Alphabetical order game
- Virtual protractor and angle maker
- Area and perimeter builder
- Bar graph maker for kids
- Math by topicFractions, times tables, long division and more
- English and grammarNouns, verbs, commas, spelling and more
- Reading passagesShort stories with read-aloud and questions
- Science by gradePlants, forces, matter, space and more
- Printable worksheetsPrint, or do them on a tablet with a finger or pen
- Free math games3D games where every move is a math question
- Manipulatives and simulationsMath tools plus science sims: cells, atoms, forces, planets
- Fraction calculatorEvery step shown, from mixed numbers to simplest form
- Math 5-a-dayFive fresh warm-up questions every day
- Guides for parentsHow to help with fractions, tables, tests and more
Math, English and science that click.