NC EOG/EOC Grade 8 Statistics and Probability Practice

What the test measures

Statistics and Probability skills

Investigate patterns of association in bivariate data using scatter plots and lines of best fit
Summarize categorical data for two categories in two-way frequency tables

Standards basis

North Carolina Standard Course of Study (NCSCOS) — North Carolina

How the NC EOG/EOC reports it

North Carolina’s math assessments are state-developed EOG/EOC tests aligned to the North Carolina Standard Course of Study (NCSCOS) for Mathematics, adopted June 2016, rather than a shared multistate framework. The EOG Grades 3-8 Mathematics Test Specifications and the EOC NC Math 1 and NC Math 3 Test Specifications publish, in Table 1/Table 2, the range of total items by domain (the official domain weight distributions). The NCSCOS K-8 domains carry CCSS domain codes (NC.3.OA, NC.8.F, …) and are CCSS-derived; NC Math 1 and NC Math 3 are integrated high-school EOC courses whose standards carry NC.M1/NC.M3 conceptual-category codes (Number and Quantity, Algebra, Functions, Geometry, Statistics and Probability).

Blueprint & weighting

Published per-domain weight ranges come from the NC DPI EOG/EOC Mathematics Test Specifications (April 2026), Table 1/Table 2 (range of total items by domain). EOG grades 3-5 (Table 1): Operations and Algebraic Thinking 32-36% (g3) / 14-18% (g4) / 9-13% (g5); Number and Operations in Base Ten 9-13% / 25-29% / 25-29%; Number and Operations – Fractions 28-32% / 30-34% / 39-43%; Measurement and Data, Geometry 23-27% / 23-27% / 19-23%. EOG grades 6-8 (Table 2): Ratios and Proportional Relationships 24-28% (g6) / 24-28% (g7) / — (g8); The Number System 20-24% / 8-12% / —; Expressions and Equations 22-26% / 20-24% / —; The Number System, Expressions and Equations (combined) — / — / 24-28%; Functions — / — / 28-32%; Geometry 12-16% / 16-20% / 24-28%; Statistics and Probability 12-16% / 22-26% / 16-20%. EOC (Table 1): NC Math 1 — Number and Quantity and Algebra 36-40%, Functions 32-36%, Geometry 8-12%, Statistics and Probability 18-20%; NC Math 3 — Number and Quantity and Algebra 32-36%, Functions 32-36%, Geometry 20-24%, Statistics and Probability 8-12%.

Official sources

NC DPI End-of-Grade (EOG)
NC DPI 2025-26 EOC Assessment Brief
NC DPI EOG Mathematics Grades 3-8 Test Specifications (April 2026)

Practice by skill

Topics mapped to this domain

Two-way tables

Grade 815 questions

Scatterplots and trend lines

Grade 818 questions

Try it now

8 free questions · 0/0 correct

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 were surveyed in total?

Add all cells: $12+8+4+16=40$ .

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 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 the daily high temperature $x$ in degrees and cups of lemonade sold $y$ is $y = 2x - 60$ . For a predicted $100$ cups sold, what should the temperature be?

Solve $100 = 2x - 60$ : $2x = 160$ , so $x = 80$ degrees.

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 for the number of car washes a club holds $x$ and the club's funds $y$ in dollars is $y = 75x + 120$ . According to the line, how many dollars did the club have before holding any car washes?

At $x = 0$ , $y = 120$ dollars: the $y$ -intercept is the starting amount.

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?