KSA Grade 8 Statistics and Probability Practice

What the test measures

Statistics and Probability skills

Construct and interpret scatter plots
Use a linear model to describe the association between two quantities
Interpret the slope and intercept of a linear model in context
Understand patterns of association in bivariate data

Standards basis

Kentucky Academic Standards (KAS) for Mathematics — Kentucky

How the KSA reports it

Kentucky KSA is a state summative assessment built on Kentucky Academic Standards (KAS) rather than a separate national framework. For mathematics, the assessed content closely follows Common Core–style grade-band domains in grades 3-8 and uses Kentucky high-school conceptual categories in grade 10.

Blueprint & weighting

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

Official sources

Kentucky Department of Education — Kentucky Summative Assessment
Kentucky Department of Education — Mathematics
Kentucky Department of Education — Kentucky Laws and Regulations

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 trend line predicts Mia will spell $18$ words correctly in a spelling bee. She actually spells $21$ words correctly. What is the residual (actual minus predicted)?

Residual $= 21 - 18 = 3$ words.

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?

The three known cells sum to $11+7+5=23$ , so the missing cell is $29-23=6$ .

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 Dog/Cat and columns Boys/Girls: Dog&Boys=10, Dog&Girls=6, Cat&Boys=5, Cat&Girls=9. How many were surveyed in total?

Add all cells: $10+6+5+9=30$ .

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 Dog/Cat and columns Boys/Girls: Dog&Boys=10, Dog&Girls=6, Cat&Boys=5, Cat&Girls=9. How many chose Dog in total?

Row total for Dog: $10+6=16$ .

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 Dog/Cat and columns Boys/Girls: Dog&Boys=10, Dog&Girls=6, Cat&Boys=5, Cat&Girls=9. What fraction of all surveyed were Dog and Boys? Simplify.