WVGSA Grade 8 Statistics and Probability. Practice it free.

Analyze bivariate data and categorical associations. This Grade 8 reporting domain maps to 2 practice skills and 8 representative questions from the playable bank.

Grade 82 mapped skills

What the test measures

Statistics and Probability skills

Construct and interpret scatter plots.
Fit and evaluate linear models.
Use linear equations to solve problems in context.
Construct and interpret two-way tables.
Analyze relative frequencies to describe associations.

Standards basis

West Virginia College- and Career-Readiness Standards for Mathematics (WVBE Policy 2520.2B) — West Virginia

How the WVGSA reports it

West Virginia’s General Summative Assessment is a state assessment aligned to the West Virginia College- and Career-Readiness Standards rather than a separate national assessment framework. The math blueprint follows CCSS-style grade-band domains and clusters, but the standards are the state’s own West Virginia College- and Career-Readiness Standards.

Blueprint & weighting

WVGSA uses the Independent / state-specific framework (by grade domains structure).

Official sources

West Virginia Department of Education: General Summative Assessment
West Virginia Department of Education: Grade 3 Mathematics Standards
West Virginia Department of Education: Grade 4 Mathematics Standards

Practice by skill

Topics mapped to this domain

Scatterplots and trend lines

Grade 818 questions

Two-way tables

Grade 815 questions

Try it now

8 free questions · 0/0 correct

Practice playeasy

A line of best fit for the number of lawns Jaden mows $x$ and his savings $y$ in dollars is $y = 15x + 40$ . According to the line, how many dollars did Jaden have saved before mowing any lawns?

At $x = 0$ lawns, $y = 40$ : the $y$ -intercept is the starting savings.

Practice playeasy

A two-way table has rows Bus/Walk and columns 6th/7th: Bus&6th=12, Bus&7th=8, Walk&6th=4, Walk&7th=16. How many chose Bus in total?

Row total for Bus: $12+8=20$ .

Practice playeasy

A trend line for hours studied $x$ and quiz score $y$ is $y = 4x + 62$ . What score does the line predict for a student who studies $3$ hours?

Substitute $x = 3$ : $y = 4(3) + 62 = 12 + 62 = 74$ .

Practice playeasy

A two-way table has rows Bus/Walk and columns 6th/7th: Bus&6th=12, Bus&7th=8, Walk&6th=4, Walk&7th=16. What fraction of all surveyed were Bus and 6th? Simplify.

$\dfrac{12}{40} = \dfrac{3}{10}$ .

Practice playeasy

A trend line predicts that a bakery will sell $75$ bagels on Monday. The bakery actually sells $79$ bagels. What is the residual (actual value minus predicted value)?

Residual $=$ actual $-$ predicted $= 79 - 75 = 4$ .

Practice playeasy

A two-way table has rows Chess/Art and columns 7th/8th: Chess&7th=9, Art&7th=4, Art&8th=11. The Chess row total is 15. How many students are Chess&8th?

Chess row total minus the known Chess cell: $15-9=6$ .

Practice playeasy

A line of best fit relating hours of practice $x$ to free throws made $y$ is $y = 6x + 10$ . According to the line, each additional hour of practice adds about how many free throws?

The slope of $y = 6x + 10$ is $6$ : the predicted change in free throws for each extra hour of practice.

Practice playeasy

A two-way table has rows Bike/Scooter and columns Morning/Afternoon: Bike&Morning=11, Bike&Afternoon=7, Scooter&Morning=5. In all, 29 trips were recorded. How many trips are Scooter&Afternoon?